Patent US2738798A successfully refreshed from Google Patents.
US2738798A
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Vacuum breaker
Assignee: WRIGHTWAY ENGINEERING Co
•
Filing: 1953-12-14
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Granted: 1956-03-20
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Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Goodrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:42
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/02; E03C1/10; E03C1/102; Y; Y10; Y10S; Y10S261/00; Y10S261/22; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2161204A
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US2098885A
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US2277878A
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US2288247A
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US2510395A
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US2559405A
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US2510396A
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US2633343A
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US2670942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |