US2641750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator system for gas heated appliances
Assignee: Wilcolator Co
•
Filing: 1951-01-27
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Granted: 1953-06-09
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Expires: 1971-01-27
Abstract
No abstract record available.
Inventors
- 👤 Vincent J Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:22
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; F; F23; F23N; F23N5/00; F23N5/02; F23N5/24; F24; F24C; F24C3/00; F24C3/12; F24C3/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1177857A
Cited
US2240340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |