Patent US3390208A successfully refreshed from Google Patents.
US3390208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer blends
Assignee: Ethyl Corp
•
Filing: 1964-08-28
•
Granted: 1968-06-25
•
Expires: 1984-08-28
Abstract
No abstract record available.
Inventors
- 👤 Charles W Montgomery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:25
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L9/00; C08L9/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA692137A
Cited
US2947719A
Cited
US2844573A
Cited
US3086957A
Cited
US3044899A
Cited
US3085082A
Cited
US3248375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |