US1924979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylene polymers and process of making same
Assignee: EIDP Inc
•
Filing: 1928-06-26
•
Granted: 1933-08-29
•
Expires: 1948-06-26
Abstract
No abstract record available.
Inventors
- 👤 William S Calcott
- 👤 Grove Penns
- 👤 Frederick B Downing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:11
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20; C07C2/00; C07C2/02; C07C2/04; C07C2/38; C08; C08F; C08F10/00; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/10; C07C2527/122
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1936-08-28 | 1937-02-27 | 1937-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-28 | 1941-02-27 | 1941-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-28 | 1945-02-27 | 1945-08-29 | $7700.00 | Window Closed / Lapsed |