Patent US2833731A successfully refreshed from Google Patents.
US2833731A
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Composition for the preparation of sponge products of butyl rubber
Assignee: Polysar Ltd
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Filing: 1954-08-11
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Granted: 1958-05-06
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Expires: 1974-08-11
Abstract
No abstract record available.
Inventors
- 👤 Heinz A Pfisterer
- 👤 David W G Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:57
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08J9/0061; C08J2323/00; C08J2323/02; C08J2423/00; C08J2423/02; C08J2423/18; C08J2423/20; C08J2423/22; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A COMPOSITION FOR THE PREPARATION OF SPONGE PRODUCTS SAID COMPOSITION COMPRISING AN ELASTIC COPOLYMER OF A MAJOR AMOUNT OF AN ISOOLEFIN AND A MINOR AMOUNT OF A DIOLEFIN, 5-20% BY WEIGHT OF POLYMER OF SODIUM BICARBONATE, 0.5-5.0% BY WEIGHT OF POLYMER OF A MIXTURE OF 98% SELECTED MINERAL OIL CONTAINING ABOUT 12 CARBON ATOMS, 1.6% SULPHONATED NAPHTHENIC PETROLEUM PRODUCT AND 0.4% N-BUTYL ALCOHOL, AND 60-95% BY WEIGHT OF POLYMER OF TALC WHICH IC SUBSTANTIALLY ALL OF A PARTICLE SIZE NOT COARSER THAN 300 MESH.
Claim 2
Dependent Claim
84 words
A COMPOSITION FOR THE PREPARATION OF SPONGE PRODUCTS SAID COMPOSITION COMPRISING AN ELASTIC COPOLYMER OF A MAJOR AMOUNT OF AN ISOOLEFIN AND A MINOR AMOUNT OF A DIOLEFIN, 5-20% BY WEIGHT OF POLYMER OF SODIUM BICARBONATE, 0.5-5.0% BY WEIGHT OF POLYMER OF A MIXTURE OF 98% SELECTED MINERAL OIL CONTAINING ABOUT 12 CARBON ATOMS, 1.6% SULPHONATED NAPHTHENIC PETROLEUM PRODUCT AND 0.4% N-BUTYL ALCOHOL, AND 60-95% BY WEIGHT OF POLYMER OF TALC WHICH IC SUBSTANTIALLY ALL OF A PARTICLE SIZE NOT COARSER THAN 300 MESH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |