Patent US2871699A successfully refreshed from Google Patents.
US2871699A
Expired / Lapsed
US
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Indicating instrument for helicopters or the like
Assignee: Kenyon Laboratories LLC
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Filing: 1956-02-21
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Granted: 1959-02-03
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Expires: 1976-02-21
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Kenyon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:43
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2001683A
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US2105598A
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US2218929A
Cited
US2130224A
Cited
US2318153A
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US2395351A
Cited
US2531492A
Cited
US2567212A
Cited
US2695143A
Cited
US2738497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |