US2722121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foreign gas responsive control apparatus
Assignee: Individual
•
Filing: 1949-05-06
•
Granted: 1955-11-01
•
Expires: 1969-05-06
Abstract
No abstract record available.
Inventors
- 👤 Clifford C Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:01
CPC Classifications
F; F25; F25B; F25B43/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US999574A
Cited
US1187334A
Cited
US1628137A
Cited
US2268469A
Cited
US2297098A
Cited
US2391916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |