Patent US2750209A successfully refreshed from Google Patents.
US2750209A
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US
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Valve coupling
Assignee: ROBB MANUFACTURING Co
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Filing: 1951-08-03
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Granted: 1956-06-12
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Expires: 1971-08-03
Abstract
No abstract record available.
Inventors
- 👤 George C Robb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:17
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/28; F16L37/38; F16L37/40; F16L37/22; F16L37/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1990557A
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US2096444A
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US2135222A
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US2255333A
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US2218318A
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US2425500A
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US2439760A
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US2413978A
Cited
US2441075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |