US3790460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon monoxide copolymers
Assignee: Air Products and Chemicals Inc
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Filing: 1970-07-13
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Granted: 1974-02-05
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Expires: 1990-07-13
Abstract
Abstract A VINYL HALIDE, SUCH AS CINYL FLURIDE AND VINYL CHLORIDE, AND CARBON MONOXIDE ARE COPOLYMERIZED IN THE SIMULTANEOUS PRESENCE OF A FREE-RADICALPOUND AND ULTRA-VIOLET LIGHT, MOST ADVANTAGEOUSLY AT A POLYMERIZATION TEMPERATURE OF 50* TO 75* C., TO PRODUCE A COPOLYMER HAVING A CARBON MONOXIDE CONTENT OF MORE THAN 3% BY WEIGHT AND AN INTRINSIC VISCOSITY OF AT LEAST 1 DL./G.
Inventors
- 👤 L Weintraub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:58
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/18; C08F214/20; C08F214/205; C08F214/02; C08F214/04; C08F214/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |