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US2786642A
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Pilot controlled resilient tubular valve
Assignee: Lippincott & Smith
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Filing: 1951-10-30
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Granted: 1957-03-26
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Expires: 1971-10-30
Abstract
No abstract record available.
Inventors
- 👤 David M Comb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:04
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/40; F16K31/402; F16K7/00; F16K7/02; F16K7/04; F16K7/07; F16K7/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2317376A
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US2331291A
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US2470744A
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US2501751A
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US2583231A
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US2590215A
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US2609001A
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FR986047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |