Patent US3497788A successfully refreshed from Google Patents.
Patent US2731038A successfully refreshed from Google Patents.
US2731038A
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Hydraulic accumulator
Assignee: Individual
•
Filing: 1953-01-26
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Granted: 1956-01-17
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Expires: 1973-01-26
Abstract
No abstract record available.
Inventors
- 👤 Purcell Howard Milne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:56
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/31; F15B2201/40; F15B2201/41; F15B2201/411; F15B2201/415; F15B2201/4155; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7313; Y10T137/7323
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1116414A
Cited
US1959640A
Cited
US2331921A
Cited
CH214127A
Cited
US2345124A
Cited
US2385016A
Cited
US2417873A
Cited
US2616453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |