US3440930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cushion seal device for power cylinders
Assignee: Westinghouse Air Brake Co
•
Filing: 1966-07-18
•
Granted: 1969-04-29
•
Expires: 1986-07-18
Abstract
No abstract record available.
Inventors
- 👤 Paul E Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:58
CPC Classifications
F; F16; F16J; F16J10/00; F16J10/02; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/223
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US980671A
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US2309446A
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US2484102A
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US2710595A
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US2853974A
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US2958551A
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US2935047A
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US2884903A
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US3005648A
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US3093153A
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US3267815A
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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) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |