US2601167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace and heat retaining unit therefor
Assignee: Individual
•
Filing: 1948-12-30
•
Granted: 1952-06-17
•
Expires: 1968-12-30
Abstract
No abstract record available.
Inventors
- 👤 Stanley E Navarro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:00
CPC Classifications
F; F23; F23M; F23M9/00; F23M9/06; F23M20/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US489874A
Cited
US508689A
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US760262A
Cited
US1255503A
Cited
US1667133A
Cited
US1725974A
Cited
US2278486A
Cited
US2147803A
Cited
US2266551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |