US2557460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide valve
Assignee: Individual
•
Filing: 1946-10-16
•
Granted: 1951-06-19
•
Expires: 1966-10-16
Abstract
No abstract record available.
Inventors
- 👤 Robert J Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0218; G; G01; G01F; G01F3/00; G01F3/02; G01F3/20; G01F3/22; G01F3/221; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US113616A
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US543634A
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DE505535C
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US630384A
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US649028A
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US979084A
Cited
US1241326A
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US1275920A
Cited
FR585695A
Cited
US1790168A
Cited
US1863759A
Cited
US1854918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |