US2657200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of acetylene with certain vinylidene compounds
Assignee: EIDP Inc
•
Filing: 1950-10-03
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Granted: 1953-10-27
•
Expires: 1970-10-03
Abstract
No abstract record available.
Inventors
- 👤 Mcgrew Frank Clifton
- 👤 Pinkney Paul Swithin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:49
CPC Classifications
C; C08; C08F; C08F10/00; C08F2/00; C08F2/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A MACROMOLECULAR COPOLYMER OF ACETYLENE WITH A POLYMERIZABLE VINYLENE COMPOUND HAVING BUT ONE VINYLIDENE GROUP SELECTED FROM THE CLASS CONSISTING OF ACRYLUC AND ALPHAALKACYLCI ACID ESTERS AND NITRILES OF SAID ACIDS, VINYL KETONES, AND VINYLIDENE COMPOUNDS HAVING AN ARYL RADICAL ATTACHED TO ONE OF THE FREE VALENCES OF THE VINYLIDENE GROUP, SAID COPOLYMER CONTAINING 5-50 MOLE PER CENT COMBINED ACETYLENE, THE REMAINED BEING, IN COMBINATION, SAID VINYLENE COMPOUND.
References Cited (Backward Citations)
FR845661A
Cited
US2327705A
Cited
US2363910A
Cited
US2561814A
Cited
US2476936A
Cited
US2540736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |