Patent US3525577A successfully refreshed from Google Patents.
US3525577A
Expired / Lapsed
US
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Propellers
Assignee: TECHNOLOGY UK
•
Filing: 1968-04-19
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Granted: 1970-08-25
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Expires: 1988-04-19
Abstract
No abstract record available.
Inventors
- 👤 Ian Clifford Cheeseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:21
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/04; B60V1/043; B60V1/14; B64; B64C; B64C11/00; B64C11/16; B64C11/20; B64C11/24; B64C27/00; B64C27/32; B64C27/325; B64C27/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2621001A
Cited
US2774552A
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US2972327A
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US3109494A
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US3139936A
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US3187817A
Cited
US3155341A
Cited
US3246861A
Cited
US3348618A
Cited
US3404737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |