US2075487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Effective temperature thermostat
Assignee: C A DUNHAM Co
•
Filing: 1935-03-09
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Granted: 1937-03-30
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Expires: 1955-03-09
Abstract
No abstract record available.
Inventors
- 👤 John H Van Zandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:14
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/02; G05D23/08; Y; Y10; Y10S; Y10S200/00; Y10S200/40; Y10S236/00; Y10S236/13
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) | 1940-03-29 | 1940-09-28 | 1941-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-29 | 1944-09-28 | 1945-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-29 | 1948-09-28 | 1949-03-30 | $7700.00 | Window Closed / Lapsed |