Patent US2520735A successfully refreshed from Google Patents.
US2520735A
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Synthetic rubber composition containing a fatty acid nitrile or polymer thereof and method of making the same
Assignee: Armour and Co
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Filing: 1948-03-06
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Granted: 1950-08-29
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Expires: 1968-03-06
Abstract
No abstract record available.
Inventors
- 👤 Anderson W Ralston
- 👤 Hoyt M Corley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:31
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L81/00; C08L33/00; C08L33/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A SYNTHETIC ELASTOMER PREPARED BY THE POLYMERIZATION OF A COMPOSITION SELECTED FROM THE CLASS CONSISTING OF BUTADIENE POLYMERS, ISOPRENE POLYMERS, CHLOROPRENE POLYMERS, AND POLYIOSBUTYLENE, SAID SYNTHETIC ELASTOMER CONTAINING A MEMBER SELECTED FROM THE GROUP CONSISTING OF FATTY ACID NITRILES HAVING AT LEAST 12 CARBON ATOMS AND THE POLYMERS THEREOF.
Claim 2
Dependent Claim
49 words
A SYNTHETIC ELASTOMER PREPARED BY THE POLYMERIZATION OF A COMPOSITION SELECTED FROM THE CLASS CONSISTING OF BUTADIENE POLYMERS, ISOPRENE POLYMERS, CHLOROPRENE POLYMERS, AND POLYIOSBUTYLENE, SAID SYNTHETIC ELASTOMER CONTAINING A MEMBER SELECTED FROM THE GROUP CONSISTING OF FATTY ACID NITRILES HAVING AT LEAST 12 CARBON ATOMS AND THE POLYMERS THEREOF.
References Cited (Backward Citations)
US2175092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |