Patent US2693229A successfully refreshed from Google Patents.
US2693229A
Expired / Lapsed
US
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Gaseous heater
Assignee: Individual
•
Filing: 1952-01-22
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Granted: 1954-11-02
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Expires: 1972-01-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Fagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:46
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/48; F23K; F23K5/00; F23K5/02; F23K5/14; F23K5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US252618A
Cited
DE267769C
Cited
US1305679A
Cited
US955946A
Cited
US1053292A
Cited
US1558510A
Cited
US2199771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |