Patent US2268754A successfully refreshed from Google Patents.
Patent US3433467A successfully refreshed from Google Patents.
US3433467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer valves
Assignee: Fawkham Developments Ltd
•
Filing: 1967-03-08
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Granted: 1969-03-18
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Expires: 1987-03-08
Abstract
No abstract record available.
Inventors
- 👤 Edward G S Thyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:47
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/0015; B01J8/0035; B65; B65G; B65G53/00; B65G2812/00; B65G2812/16; B65G2812/1608; B65G2812/1616; B65G2812/1625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US533929A
Cited
US1086964A
Cited
US1258912A
Cited
US2726137A
Cited
US2715548A
Cited
US3266788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |