Patent No. 8,075, awarded on May 6, 1851.
I do claim as my invention, and desire to secure by Letters Patent, is-
1. The combining of india-rubber and sulphur, either with or without shellac, for making a hard and inflexible substance hitherto unknown, substantially as herein set forth.
2. The combining of india-rubber, sulphur, and magnesia or lime, or a carbonate or a sulphate of magnesia or of lime, either with or without shellac, for making a hard and inflexible substance hitherto unknown, substantially as herein set forth.
New York, December 26, 1850.
NELSON GOODYEAR.