Patent US2904014A successfully refreshed from Google Patents.
US2904014A
Expired / Lapsed
US
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Heating and hot water boiler
Assignee: Individual
•
Filing: 1957-03-21
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Granted: 1959-09-15
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Robert L Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:35
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/48; F24H1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US351094A
Cited
US1141247A
Cited
US1851851A
Cited
US1989047A
Cited
US2216369A
Cited
US2618246A
Cited
US2791204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |