US2548504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of 3,4 or 3,5-dichloro alpha methyl-styrene with fluoroethylenes
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1946-08-28
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Granted: 1951-04-10
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Expires: 1966-08-28
Abstract
No abstract record available.
Inventors
- 👤 Grotenhuis Theodore A Te
- 👤 Gilbert H Swart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:24
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/16; C08F212/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A COPOLYMERIZATION PRODUCT OF AN ALPHAMETHYLSTYRENE AND A MEMBER OF THE GROUP CONSISTING OF ETHYLENE AND ETHYLENES HAVING ONE TO FOUR HYDROGEN ATOMS SUBSTITUTED BY FLUORINE, SAID ALPHA-METHYLSTYRENE HAVING TWO NUCLEAR HALOGEN ATOMS AND HAVING NUCLEAR CARBON ATOMS NEXT ADJACENT THE CARBON ATOM DIRECTLY CARRYING THE ISOPROPENYL GROUP FREE OF SUBSTITUENTS, THE AMOUNT OF ALPHA-METHYLSTYRENE HAVING THE ABOVE CHARACTERISTICS BEING 1 TO 90 MOL PER CENT OF SAID COPOLYMERIZATION PRODUCT.
Claim 2
Dependent Claim
70 words
A COPOLYMERIZATION PRODUCT OF AN ALPHAMETHYLSTYRENE AND A MEMBER OF THE GROUP CONSISTING OF ETHYLENE AND ETHYLENES HAVING ONE TO FOUR HYDROGEN ATOMS SUBSTITUTED BY FLUORINE, SAID ALPHA-METHYLSTYRENE HAVING TWO NUCLEAR HALOGEN ATOMS AND HAVING NUCLEAR CARBON ATOMS NEXT ADJACENT THE CARBON ATOM DIRECTLY CARRYING THE ISOPROPENYL GROUP FREE OF SUBSTITUENTS, THE AMOUNT OF ALPHA-METHYLSTYRENE HAVING THE ABOVE CHARACTERISTICS BEING 1 TO 90 MOL PER CENT OF SAID COPOLYMERIZATION PRODUCT.
References Cited (Backward Citations)
US2473985A
Cited
US2403213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |