US1950431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogen derivative of acetylene polymers and process for making same
Assignee: EIDP Inc
•
Filing: 1930-10-22
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Granted: 1934-03-13
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Expires: 1950-10-22
Abstract
No abstract record available.
Inventors
- 👤 Wallace H Carothers
- 👤 Arnold M Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:16
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/02; C07C21/19; C07C21/20; C07C21/21; C07C17/00; C07C17/07; C07C17/08
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) | 1937-03-12 | 1937-09-11 | 1938-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-03-12 | 1941-09-11 | 1942-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-03-12 | 1945-09-11 | 1946-03-13 | $7700.00 | Window Closed / Lapsed |