US2726643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating unit
Assignee: Individual
•
Filing: 1953-02-03
•
Granted: 1955-12-13
•
Expires: 1973-02-03
Abstract
No abstract record available.
Inventors
- 👤 Ray C Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:11
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/22; F24H1/40; F24H1/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1609359A
Cited
US1959286A
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US2159284A
Cited
US2130894A
Cited
US2201406A
Cited
US2234423A
Cited
US2291023A
Cited
US2327339A
Cited
US2540055A
Cited
US2642849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |