Patent US2643247A successfully refreshed from Google Patents.
US2643247A
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Synthetic rubberlike materials from an alkyl acrylate and an aliphatic diene hydrocarbon
Assignee: United States Department of Agriculture
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Filing: 1952-04-04
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Granted: 1953-06-23
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Expires: 1972-04-04
Abstract
No abstract record available.
Inventors
- 👤 Charles H Fisher
- 👤 William C Mast
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:31
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS OF PREPARING A SYNTHETIC RUBBER COMPRISING HEATING A MIXTURE CONTAINING, AS MONOMERIC COMPONENTS, AN ALKYL ACRYLATE AND AN ALIPHATIC DIENIC HYDROCARBON IN THE PROPORTION, BY WEIGHT, OF AT LEAST 80 PERCENT OF THE ACRYLATE TO AT LEAST 1 PERCENT OF THE DIENIC HYDROCARBON, TO EFFECT COPOLYMERIZATION OF SAID MONOMERIC COMPONENTS, COMPOUNDING THE RESULTING POLYMER WITH SULFUR AS A VULCANIZING AGENT AND HEATING THE COMPOUNDED MIXTURE TO EFFECT VALCANIZATION.
Claim 2
Dependent Claim
70 words
A PROCESS OF PREPARING A SYNTHETIC RUBBER COMPRISING HEATING A MIXTURE CONTAINING, AS MONOMERIC COMPONENTS, AN ALKYL ACRYLATE AND AN ALIPHATIC DIENIC HYDROCARBON IN THE PROPORTION, BY WEIGHT, OF AT LEAST 80 PERCENT OF THE ACRYLATE TO AT LEAST 1 PERCENT OF THE DIENIC HYDROCARBON, TO EFFECT COPOLYMERIZATION OF SAID MONOMERIC COMPONENTS, COMPOUNDING THE RESULTING POLYMER WITH SULFUR AS A VULCANIZING AGENT AND HEATING THE COMPOUNDED MIXTURE TO EFFECT VALCANIZATION.
References Cited (Backward Citations)
US2442588A
Cited
US2393438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |