US2515992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouple safety pilot switch
Assignee: Milwaukee Gas Specialty Co
•
Filing: 1944-06-17
•
Granted: 1950-07-18
•
Expires: 1964-06-17
Abstract
No abstract record available.
Inventors
- 👤 Richard K Engholdt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:21
CPC Classifications
F; F23; F23Q; F23Q9/00; F23Q9/08; F23Q9/12; F23Q9/14; Y; Y10; Y10T; Y10T137/00; Y10T137/1407
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2237577A
Cited
US621739A
Cited
US1149325A
Cited
US1267603A
Cited
US1560440A
Cited
US1507643A
Cited
US2164694A
Cited
US2132057A
Cited
US2096546A
Cited
US2183827A
Cited
US2198453A
Cited
US2165801A
Cited
US2119450A
Cited
US2245834A
Cited
US2337001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |