US3361706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of the photochromic return rate of (arylazo) thioformic arylhydrazidates
Assignee: Wyeth Holdings LLC
•
Filing: 1964-03-06
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Granted: 1968-01-02
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Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 Meriwether Lewis Smith
- 👤 Breitner Edith Clara
- 👤 Sloan Carol Louise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA649852A
Cited
US2921407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |