US2774565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for gas water heaters
Assignee: Vaillant GmbH
•
Filing: 1951-03-13
•
Granted: 1956-12-18
•
Expires: 1971-03-13
Abstract
No abstract record available.
Inventors
- 👤 Klemp Siegfried
- 👤 Donges Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:01
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/52; F23; F23N; F23N1/00; F23N1/08; F23N1/087; F23N2241/00; F23N2241/04; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2511; Y10T137/8593; Y10T137/87153
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309083A
Cited
US556641A
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US654602A
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US674289A
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US762249A
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US859371A
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US1055152A
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US1066891A
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FR468343A
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US1255835A
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US1552100A
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US1506834A
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US1603005A
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US1730455A
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DE505717C
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US1856845A
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US2094288A
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US2088174A
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US2145305A
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US2634758A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |