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Patent US3409104A successfully refreshed from Google Patents.
US3409104A
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US
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Dual pressure progressive valve structure
Assignee: Cleveland Gear Co
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Filing: 1965-06-11
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Granted: 1968-11-05
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Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 George H Acker
- 👤 Thomas J Gruber
- 👤 John R Leber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:16
CPC Classifications
F; F16; F16N; F16N25/00; F16N25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |