Patent US2777136A successfully refreshed from Google Patents.
US2777136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide and ball flush valve
Assignee: Individual
•
Filing: 1953-11-05
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Granted: 1957-01-15
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Expires: 1973-11-05
Abstract
No abstract record available.
Inventors
- 👤 Andrew W Harkness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:58
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/14; E; E03; E03D; E03D1/00; E03D1/30; E03D1/34; F16K21/00; F16K21/04; F16K21/06; F16K21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1767021A
Cited
US2572982A
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US2632182A
Cited
US2650369A
Cited
US2626399A
Cited
US2599940A
Cited
US2668960A
Cited
US2657395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |