US3435005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Branched oxymethylene copolymers and method of preparation
Assignee: Celanese Corp
•
Filing: 1964-07-01
•
Granted: 1969-03-25
•
Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 Francis B Mcandrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:52
CPC Classifications
C; C07; C07D; C07D409/00; C07D409/02; C07D409/04; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/44; C07D213/46; C07D213/50; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/22; C08; C08G; C08G2/00; C08G2/06; C08G2/18; C08G2/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2457224A
Cited
US3112280A
Cited
US3027352A
Cited
US3219631A
Cited
US3252939A
Cited
US3293219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |