US2698158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slow-seating valve assembly
Assignee: Individual
•
Filing: 1952-03-28
•
Granted: 1954-12-28
•
Expires: 1972-03-28
Abstract
No abstract record available.
Inventors
- 👤 Albert J Granberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:32
CPC Classifications
F; F16; F16K; F16K21/00; F16K21/04; F16K21/06; F16K21/12; Y; Y10; Y10T; Y10T137/00; Y10T137/3367; Y10T137/3476; Y10T137/353
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US540347A
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US613802A
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US851165A
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US1541538A
Cited
US2039109A
Cited
US2102848A
Cited
US2000297A
Cited
US2205033A
Cited
GB496638A
Cited
US2557378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |