Patent US3935660A successfully refreshed from Google Patents.
Patent US2646994A successfully refreshed from Google Patents.
US2646994A
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US
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Valved pipe coupling
Assignee: Individual
•
Filing: 1949-06-18
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Granted: 1953-07-28
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Expires: 1969-06-18
Abstract
No abstract record available.
Inventors
- 👤 Albert T Scheiwer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:43
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/22; F16L37/23; F16L37/28; F16L37/30; F16L37/32; F16L37/35; F16L37/367; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87917; Y10T137/87925; Y10T137/87941; Y10T137/87949; Y10T137/87957
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US137823A
Cited
US2135222A
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US2299193A
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US2428637A
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US2419642A
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US2461704A
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US2461700A
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US2471237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |