Patent US2493890A successfully refreshed from Google Patents.
US2493890A
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Ignition system for gas or liquid fuel appliances
Assignee: W J SCHOENBERGER CO
•
Filing: 1945-06-29
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Granted: 1950-01-10
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Expires: 1965-06-29
Abstract
No abstract record available.
Inventors
- 👤 Birchard L Matthews
- 👤 Edward J Zarybnicky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:04
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/10; F23; F23N; F23N5/00; F23N5/02; F23N5/08; F23N5/082; F24C3/106; F23N2235/00; F23N2235/12; F23N2235/14; F23N2235/24
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |