US2528579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1947-06-11
•
Granted: 1950-11-07
•
Expires: 1967-06-11
Abstract
No abstract record available.
Inventors
- 👤 Earl K Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:15
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1101527A
Cited
US1143579A
Cited
US1141176A
Cited
US2155425A
Cited
US2257580A
Cited
US2229873A
Cited
US2260793A
Cited
US2416645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |