Patent US3437880A successfully refreshed from Google Patents.
US3437880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric gas ignitor
Assignee: Individual
•
Filing: 1967-02-16
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Granted: 1969-04-08
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Franz Profunser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:01
CPC Classifications
F; F23; F23Q; F23Q7/00; F23Q7/14; F23Q7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB552594A
Cited
GB314773A
Cited
US319380A
Cited
US1898418A
Cited
US2373766A
Cited
FR971664A
Cited
US2487752A
Cited
US2487754A
Cited
US2850084A
Cited
US2967224A
Cited
US3298420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |