Patent US3274579A successfully refreshed from Google Patents.
US3274579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusible plug flame detection system
Assignee: Individual
•
Filing: 1964-02-25
•
Granted: 1966-09-20
•
Expires: 1984-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Forney Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:05
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F02; F02B; F02B77/00; F02B77/08; F23D; F23D14/00; F23D14/46; F23D14/72; F23N2227/00; F23N2227/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
THE METHOD OF DETECTING FLAME FAILURE IN A STATIC INSTALLATION HAVING A FUEL BURNER THEREIN INCLUDING THE STEPS OF CONTINUOUSLY INSERTING AND WITHDRAWING FROM A COMBUSTION AREA WITHIN SAID STATIC INSTALLATION A PROBE HAVING A PLURALITY OF SPACED FUSIBLE ELEMENTS THEREON, DETECTING THE MELTING OR NON-MELTING OF FUSIBLE ELEMENTS AND CONTINUOUSLY PROVIDING SAID PROBE WITH NEW FUSIBLE ELEMENTS.
References Cited (Backward Citations)
US1953072A
Cited
US3052876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |