US2177779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shut-off valve for liquid fuel burners
Assignee: TODD COMB EQUIPMENT Inc
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Filing: 1938-04-15
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Granted: 1939-10-31
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Expires: 1958-04-15
Abstract
No abstract record available.
Inventors
- 👤 Mcdonald James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/24; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7613; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-10-30 | 1943-05-01 | 1943-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-30 | 1947-05-01 | 1947-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-30 | 1951-05-01 | 1951-10-31 | $7700.00 | Window Closed / Lapsed |