US2561290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Individual
•
Filing: 1947-05-06
•
Granted: 1951-07-17
•
Expires: 1967-05-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Payant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/06; F24D5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US289634A
Cited
GB191402009A
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US1168304A
Cited
FR634837A
Cited
GB475229A
Cited
GB457265A
Cited
US2210960A
Cited
US2181814A
Cited
US2240951A
Cited
US2346220A
Cited
US2465184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |