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Patent US3475912A successfully refreshed from Google Patents.
US3475912A
Expired / Lapsed
US
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Propulsion units
Assignee: UA Engineering Ltd
•
Filing: 1967-10-02
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Granted: 1969-11-04
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Expires: 1987-10-02
Abstract
No abstract record available.
Inventors
- 👤 Richard Angier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:09
CPC Classifications
B; B63; B63H; B63H11/00; B63H11/02; B63H11/10; B63H11/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3214903A
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US3249083A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |