Patent US2193659A successfully refreshed from Google Patents.
US2193659A
Expired / Lapsed
US
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Liquid fuel burning system and regulating apparatus
Assignee: Individual
•
Filing: 1936-07-25
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Granted: 1940-03-12
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Expires: 1956-07-25
Abstract
No abstract record available.
Inventors
- 👤 Forrest R Whitcomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:02
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/46; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2511; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7835; Y10T137/7836; Y10T137/8593; Y10T137/87265; Y10T137/87499
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) | 1943-03-12 | 1943-09-11 | 1944-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-12 | 1947-09-11 | 1948-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-12 | 1951-09-11 | 1952-03-12 | $7700.00 | Window Closed / Lapsed |