US2870699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warm air baseboard heating structure
Assignee: Individual
•
Filing: 1955-01-26
•
Granted: 1959-01-27
•
Expires: 1975-01-26
Abstract
No abstract record available.
Inventors
- 👤 Richards Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:45
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/072; F24D; F24D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA507683A
Cited
US1488090A
Cited
US1809223A
Cited
US1942137A
Cited
US2567789A
Cited
US2627800A
Cited
US2742845A
Cited
US2741970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |