US2497321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflector type gas burner
Assignee: Individual
•
Filing: 1946-04-01
•
Granted: 1950-02-14
•
Expires: 1966-04-01
Abstract
No abstract record available.
Inventors
- 👤 John R Pattinson
- 👤 Darwin G Pattinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:36
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/70; F23D14/02; F23D14/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390660A
Cited
US2012580A
Cited
CH51534A
Cited
US1158652A
Cited
US1498342A
Cited
US1815322A
Cited
US1731306A
Cited
US2116840A
Cited
US2183836A
Cited
US2220572A
Cited
US2475240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |