US2969918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar heating control system
Assignee: Individual
•
Filing: 1954-10-11
•
Granted: 1961-01-31
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Forster C Phelps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:33
CPC Classifications
E; E04; E04F; E04F10/00; E04F10/08; E04F10/10; A; A01; A01G; A01G9/00; A01G9/22; A01G9/24; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/1924; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25; Y10; Y10S; Y10S165/00; Y10S165/904
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) | 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 |