US2969637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for converting solar energy into mechanical energy
Assignee: Individual
•
Filing: 1956-06-28
•
Granted: 1961-01-31
•
Expires: 1976-06-28
Abstract
No abstract record available.
Inventors
- 👤 Richard J Rowekamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:53
CPC Classifications
F; F25; F25B; F25B27/00; F25B27/002; F03; F03G; F03G6/00; F03G6/003; F24; F24S; F24S10/00; F24S10/70; F24S60/00; F24S60/30; F25B11/00; F25B2400/00; F25B2400/14; F25B2400/141; Y; Y02; Y02E; Y02E10/00; Y02E10/40; Y02E10/44; Y02E10/46; Y10; Y10S; Y10S159/00; Y10S159/39; Y10S159/902; Y10S159/903; Y10S203/00; Y10S203/01; Y10S203/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |