Patent US3531427A successfully refreshed from Google Patents.
US3531427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized aqueous solutions of alkyl vinyl ether - unsaturated polybasic acid copolymers
Assignee: GAF Corp
•
Filing: 1967-03-02
•
Granted: 1970-09-29
•
Expires: 1987-03-02
Abstract
No abstract record available.
Inventors
- 👤 Irene R Kervenski
- 👤 Clarence R Stahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:02
CPC Classifications
C; C08; C08F; C08F267/00; C08F267/04; C08F261/00; C08F261/06; C08K; C08K5/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
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 |