US2509607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heating system
Assignee: Individual
•
Filing: 1945-11-13
•
Granted: 1950-05-30
•
Expires: 1965-11-13
Abstract
No abstract record available.
Inventors
- 👤 George A Mussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/10; F24D19/1006; F24D19/1009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2023447A
Cited
US2211573A
Cited
US2307723A
Cited
CH212604A
Cited
US2282013A
Cited
US2382340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |