US2998006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar fluid heater
Assignee: Individual
•
Filing: 1958-07-01
•
Granted: 1961-08-29
•
Expires: 1978-07-01
Abstract
No abstract record available.
Inventors
- 👤 John G Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:17
CPC Classifications
F; F24; F24S; F24S23/00; F24S23/70; F24S23/77; F24S10/00; F24S10/50; F24S10/70; F24S10/74; F24S10/742; F24S70/00; F24S70/30; F24S70/60; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y10; Y10S; Y10S126/00; Y10S126/907; Y10S165/00; Y10S165/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2462952A
Cited
US2553302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |