US2489026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifogging composition
Assignee: Wyeth Holdings LLC
•
Filing: 1946-07-02
•
Granted: 1949-11-22
•
Expires: 1966-07-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard L Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:26
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1369708A
Cited
US2292097A
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FR835187A
Cited
FR856046A
Cited
US2365297A
Cited
US2372171A
Cited
US2416254A
Cited
US2414015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |