Patent US3487723A successfully refreshed from Google Patents.
US3487723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epicyclic gear boxes
Assignee: Derruppe SA
•
Filing: 1967-05-02
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Granted: 1970-01-06
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Expires: 1987-05-02
Abstract
No abstract record available.
Inventors
- 👤 Rene R P Piot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:33
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2164729A
Cited
US2256725A
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US2930258A
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US2799184A
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US3109324A
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US3022683A
Cited
US3213713A
Cited
US3307433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |