US1926533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic heat regulator
Assignee: GRAYSON APPLIANCE Co Ltd
•
Filing: 1932-03-11
•
Granted: 1933-09-12
•
Expires: 1952-03-11
Abstract
No abstract record available.
Inventors
- 👤 John H Grayson
- 👤 Frederick A Straub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:20
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87861
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) | 1936-09-11 | 1937-03-13 | 1937-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-09-11 | 1941-03-13 | 1941-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-09-11 | 1945-03-13 | 1945-09-12 | $7700.00 | Window Closed / Lapsed |