US2472746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating unit, including reciprocating grates
Assignee: Individual
•
Filing: 1947-03-17
•
Granted: 1949-06-07
•
Expires: 1967-03-17
Abstract
No abstract record available.
Inventors
- 👤 Leslie F Gough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:25
CPC Classifications
F; F23; F23B; F23B30/00; F23B30/02; F23B30/06; F23B30/10; F23B2700/00; F23B2700/011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2428874A
Cited
US649478A
Cited
US689827A
Cited
US1131214A
Cited
US1088445A
Cited
US1605665A
Cited
US1564813A
Cited
US1666418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |