US3531435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film-forming aromatic polyketoester polymers and percursors
Assignee: 3M Co
•
Filing: 1965-09-01
•
Granted: 1970-09-29
•
Expires: 1985-09-01
Abstract
No abstract record available.
Inventors
- 👤 Robert L Wear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:30
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/065; C07; C07C; C07C65/00; C07C65/32; C07C65/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1654289A
Cited
US1886237A
Cited
US1865096A
Cited
GB345204A
Cited
US2600376A
Cited
US3297650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |