Patent US2906257A successfully refreshed from Google Patents.
US2906257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heater
Assignee: Individual
•
Filing: 1957-03-15
•
Granted: 1959-09-29
•
Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Charles G Abbot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:51
CPC Classifications
F; F24; F24S; F24S10/00; F24S10/40; F24S10/45; F24S23/00; F24S23/70; F24S23/74; F24S30/00; F24S2030/10; F24S2030/13; F24S2030/134; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |