September 26, 1945 Dr - 5.

August 2, 1948 Dr.

E. 1. d u Po n t d e Ne m o u r s & Co mp a n y INC O RPO R ATED Wil m in g t o n 9 8 , De l a w a r e ORGANIC CHEM ICALS DEPARTMENT PETROLEUM CHEM ICALS DIVISION Copy to: Mr.

It } si U N I T ED ST A T ES M A RITIM E CO M M ISSIO N .

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ROBERT M.

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s a l Oil Pr o d u c t s Co m p a n y /N E R A LIC E N SO R D U B B S C R A C K IN G PROCESS Ch i c a g o , U.S.A.

COPY Sant i ago, 2nd.

cc : Dr.

129 FRONT STREET, NEW YORK CITY March 21, 1940 professor, Robert A.

Nev: York, N.v.

Number I JANUARY, 1941 HIGHLIGHTS Housing outhori+y official tails why \$$d and soil makes a better plumb ing Installation.

Patented July 26,1949 2,477,277 UNITED STATES PATENT OFFICE 2,477,277 COMPOSITE LEAD SULFATE-LEAD SILICATE PIGMENT AND PROCESS OF MANUFAC TURE Fnutdi J.

INTER- OFFICE CORRESPONDENCE Et h y l Ga s o l in e Co r p o r a t io n Gh b y s l e b b u il d in g 405 Le x in g t o n Av e n o k Ne w Yo b k July 31, 1940.