Document zQvrQb4pJ1Qgmy5ODk4BpVyz

GHQ March 11, 1947 436-R41 MEMORANDUM PLAINTIFF'S EXHIBIT JM 1138 Meeting at Owens-Corning Fiberglas Corp., Toledo, Ohio Present: Messrs. Staelin, Overman, Briley and an unidentified individual from the 0-C Legal Department for Owens-Corning; and Messrs. Kline, Coss and Olson for Johns-Manville Corp. The following classification of the 0-C patents was decided upon with respect to their application to the various processes and products. "WOOL PROCESS* "Wool Process" by 0-C definition is limited to the formation of batts or blankets over 1/4" in thickness. Important Patents Used $ Cr 1,913,242 McClure - exclusively licensed to 0-C - covers composition of batch used for batts without binder, such as stove insulation. 2,083,132 - Williams et al. ) essentially cover the application of a 2,107,"84 - Bone et al. ) lubricant in the form of an emulsion. 2,133,236 - Slayter - covers a number of different ideas including the drawing out of a glass stream to attenuate it into a single fiber. This is the standard procedure employed by 0-C for wool and mats. Another feature is the electrical heating of the orifice plate which is also standard practice. The patent also covers fibers of a very fine diameter size. This is important with respect to mats but not to batts. 2,206,060 2,206,058 ASlater - broadly covers the standard blower construction. 81ayter et al. - relates to the improved blower which imparts a whipping action to the filaments as they are A drawn. It was stated that this feature, used for all home insulation, was very important for the high production rates required. MTC 017463 #2,252,157 - BergIn 2,335,102 - Bergin et &1. 2,351,802 - Bergin relate to the use of phenol-formaldehyde^ and oil. This la the standard binder forS.ii home insulation and board products. If 2,257,767 Slayter et al. - covers two separate features, both of f. which are of importance in the home insulation field. The /A first is the bushing of V-shape (streamlined) used for all batt and mat products. The more refined design of the ^ bushing as covered in Simison patents #2,407,294/and \ 2,407,456, referred to later, is used only in tne-^rawing ^ of continuous filaments. The other group of elaimsN^overs a system of electrically heating a number of bushings\ \ > connected in series. This feature is used only in the\ ' wool drawing operation. U' # 2.287.006 - Klelst et al. ) cover apparatus and method for drawing"? ) 2.287.007 - Kleist et al. ) fibers through an expanding tube, the j ^ fibers being collected on a perforate conveyor. 2,361,578 - Vilensky - covers an alloy bushing comprising 98 to 99i75 platinum and 0.25 to 2% nickel. This alloy is used for all bushings. The patent is assigned on its face to Owens-Illinois and is not included in either the original list put out by 0-C, or the supplemental list given at the meeting. However, it was inferred that we could be licensed under this patent. A 2,165,318 - Vilensky - covers the electrical heating of a plurality of h bushings in series, and also the circulation of a cooling fluid adjacent the bushings to prevent leakage, both of these features being used in the "Wool Process". In addition to the above, the following patents were mentioned but did not appear to be of particular interest: Collins A Simison et al. McClure Simpson Baker , MATS (Felted Sheets not over 1/4" in Thickness) Of the patents discussed above in connection with the "Wool Process", the following also apply to the mats: Irj 2.0 S o t 0 236 -A \ -"i ,NU -WJ! Slayter A'Slayter 2,257.767 'A 2,287/006 A Slayter et al. Kleist et al. A2,287,007 Kielst et al. -2MTC 017464 Patents not previously discussed and applying to mats are: #1,954,732 Gossler - covering broadly the electrical heating of the orifice plate. The patent appears to be clearly Invalid over known prior art, including British patents #129,324, Holmes, and #165,062, Roiboul, and was not emphasised. It is not known why this patent was grouped solely under mats when it would apparently apply to all processes, if any. k ^ 2,306,347 Slayter - covers the drafting of a mat to reduce its 7^ thickness. This idea is commerdaily used, the mats being drafted, say, 2-1. 2,334,961 Schoenlaub - covers the glass composition developed for \ electrical uses. Host mats, except battery mats, and n most continuous filaments, are made from this composition. It was claimed that this was the first textile glass which included no soda. 2,165,318 2,224,466 Thomas et al - covers means for controlling the heating of the orifice plates to secure uniform temperatures. This feature is used for the mat and, it is believed, A also for the "Wool Process". Baker et al. - Skirted Blower. A BLOWS WOOL AS MADE BY THE MAT PROCESS CONVERTED TO STAPLE YARNS 2,314,857 2,264,345 2,133,238 2,239,722 :)Tucker et al -) cover the commercial process for drafting Tucker et al sliver from the fibrous mat. Slayter et al. - covers yarns of commercial filament sice and number. It applies to both staple and continuous yarns. The validity of the patent which, in our opinion is in grave doubt in view of British Pat. #165,052, was discussed briefly. Lanan et al. - covers the passing of a sliver through a twister to give false twist. This is a practical ex pedient which is used. Other patents under this heading which were mentioned but apparently were not considered to be of primary importance are: #2,202,030 - /A Re.22,078 A 2,411,326 ^ Siegfried Newman et al. McMillin et al.; also 2,175,226 A Slayter - which covers a shingle with an insulating layer of glass wool. If this idea were to be used, a separate license would be reaulred as there is some special license arrangement now with respect to the patent. -3MTC 017465 AIR FILTERS The apparatus and method patents included in the categories above and which also apply to the process used for making the air filter type fiber aret #2,133,238 2,806,060 2,257,767 2,361,578 2,165,318 Slayter et al. Slayter Slayter et al. Vilensky; and Thomas et al. Patents relating directly to the air filter, per se. are: 2,122,514 - Crocker - which covers the use of a coating of tri- cresyl phosphate 2,044*221 - Meyers et al. ) cover the commercial frame construction) A 1,898,424 - Collins ) 2.353.936 - Smith) cover salts used in substitution for tri-cresyl*l "ft 2.353.937 - Smith) phosphate when the latter could not be obtained.) C0HTIHP0PS DRAWIHQ MTC 017466 Patents covering this process and which were discussed above are: #2,133,238 2,165,318 2.255.578 2.361.578 2,334,961 Slayter et al.A Thomas et al. A Baker A Vilensky; and A Schoenlaub A Additional patents are: 2,300,736 - Slayter et al. - covering a viscosity range of 70-700 A poises. Glass melts within this viscosity range may <T also be used in the wool and mat processes but are of particular interest in connection with the continuous drawing. Staelin claimed that the conventional range as used by the Goasler and other early processes, was much higher. He further stated that the viscosity range covered in this patent is very important with platinum orifices; also, that Glass Floss uses a much higher viscosity. 2,334,961 - Schoenlaub - glass composition . rV A2,224,149 - Fisher - oiling device . * u. 2,391,870 - Beach - Traverse - '^r> 2,364,569 - Thomas et al. - traverse (now mostly superseded by A. construction of 2,391,870) " 2,274,681 - Fletcher - expanding winding spool. (This was stated to be an important idea but we never thought it to be of interest) 2,407,295 - Simlson et al. 2,407,456 - 8i*ison et al. ) c*er the orifice plates employed."I A A-FIBER (Superfine) #2,175,225 - Slayter - Is the only 0-C issued patent specifically directed to the formation of A-fiber. It was stated that there are a number of applications pending and that .Belas may have some patents on the burner 0-C has an exclusive rlgjyt; unriar !all Selaapatents thaT" relate specifically to the glass Tiber rieid, with the right to sub-license. The apparatus and methods employed for the A-fiber are mainly similar to those used in the staple field and many of the same patents would aDply. PATENTS OF BORE OR LESS GENERAL IBTEREST 2,215,039 - Hood et al.) These patents are directed to processes 2,221,709 - Hood et al.) of leaching glass fibers. 2,133,237 - Slayter - Combinations of glass and organic fibers 2,132,702 - Simpson) Combinations of glass and asbestos fibers and 2,230,271 - Simpson) method of making. 2,390,370 - Hyde ) Use of silicone adhesives with glass fibers. 2,392,805 - Biefeld ) ESOtpm E.S. Olson MTC 017^67 -5-