US2702898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-responsive control apparatus
Assignee: ELECTRO WATT ELECTRICAL AND IN
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Filing: 1953-10-06
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Granted: 1955-02-22
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Expires: 1973-10-06
Abstract
No abstract record available.
Inventors
- 👤 Meili Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:50
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10; G08B17/11; G08B17/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |