US2426645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: Linde Air Products Co
•
Filing: 1942-07-09
•
Granted: 1947-09-02
•
Expires: 1962-07-09
Abstract
No abstract record available.
Inventors
- 👤 Peter M Riede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:53
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390332A
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US1340472A
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US1563129A
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US1583378A
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US1566340A
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US1595536A
Cited
US1667992A
Cited
US2056553A
Cited
US2150078A
Cited
US2296640A
Cited
US2258416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-01 | 1951-03-03 | 1951-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-01 | 1955-03-03 | 1955-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-01 | 1959-03-03 | 1959-09-02 | $7700.00 | Window Closed / Lapsed |