US1583496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-regulating system
Assignee: Individual
•
Filing: 1924-02-23
•
Granted: 1926-05-04
•
Expires: 1944-02-23
Abstract
No abstract record available.
Inventors
- 👤 William L Shafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:09
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2057; F24H15/00; F24H15/20; F24H15/254; F24H15/30; F24H15/345; F24H15/355; F24H15/37; F24H15/40; F24H15/486; Y; Y10; Y10S; Y10S236/00; Y10S236/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-05-03 | 1929-11-02 | 1930-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-05-03 | 1933-11-02 | 1934-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-05-03 | 1937-11-02 | 1938-05-04 | $7700.00 | Window Closed / Lapsed |