Patent US2638976A successfully refreshed from Google Patents.
US2638976A
Expired / Lapsed
US
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Gas burner cap with branched outlet ports
Assignee: Patrol Valve Co
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Filing: 1952-12-16
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Granted: 1953-05-19
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Expires: 1972-12-16
Abstract
No abstract record available.
Inventors
- 👤 Leslie F Vixler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:10
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/02; F23D14/04; F23D14/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US555070A
Cited
US2190099A
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US1595638A
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US1657995A
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US2015266A
Cited
GB526476A
Cited
US2441242A
Cited
US2546009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |