US2807215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable displacement pump
Assignee: Crane Packing Co
•
Filing: 1955-07-28
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Granted: 1957-09-24
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Expires: 1975-07-28
Abstract
No abstract record available.
Inventors
- 👤 Hawxhurst Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:34
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/12; F04B49/121; F04B43/00; F04B43/08; F04B43/10; F04B43/107; F04B53/00; F04B53/14; F04B53/142; G; G01; G01F; G01F3/00; G01F3/02; G01F3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1301485A
Cited
US1696825A
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US1650377A
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FR673850A
Cited
GB350817A
Cited
US2041468A
Cited
US2424595A
Cited
US2496711A
Cited
GB637589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |