US2835228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure compensator for variable volume pumps
Assignee: American Brake Shoe Co
•
Filing: 1954-12-07
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Granted: 1958-05-20
•
Expires: 1974-12-07
Abstract
No abstract record available.
Inventors
- 👤 James R Parr
- 👤 Edwin L Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:52
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2214552A
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US2299235A
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US2299234A
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FR885907A
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US2658483A
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US2621632A
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US2754806A
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US2713312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |