US2578628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve protector
Assignee: Individual
•
Filing: 1949-05-31
•
Granted: 1951-12-11
•
Expires: 1969-05-31
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:01
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T74/00; Y10T74/21; Y10T74/219
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US748720A
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US1240776A
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US1293607A
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US1374774A
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US1629693A
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US1634672A
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US1670241A
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US1865670A
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DE615381C
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US2113060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |