US3505181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of titanium surfaces
Assignee: UK Secretary of State for Defence
•
Filing: 1964-05-27
•
Granted: 1970-04-07
•
Expires: 1984-05-27
Abstract
No abstract record available.
Inventors
- 👤 William Arthur Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:46
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2053090A
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US2142564A
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US2207808A
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US2176389A
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US2902419A
Cited
US3031387A
Cited
US3075903A
Cited
GB919202A
Cited
US3115424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |