US2606736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push type reversing valve
Assignee: KELLER TOOL CO
•
Filing: 1947-08-07
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Granted: 1952-08-12
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Expires: 1967-08-07
Abstract
No abstract record available.
Inventors
- 👤 William P Ferm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:55
CPC Classifications
F; F01; F01B; F01B17/00; F01B17/02; A; A61; A61B; A61B1/00; A61B1/00064; A61B1/00066; A61B1/00068; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1925109A
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US972826A
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US1219334A
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US1747899A
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US2067714A
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US2039638A
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US2246379A
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US2427755A
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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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |