US2631781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating and cooling controller
Assignee: Detroit Controls Corp
•
Filing: 1948-12-30
•
Granted: 1953-03-17
•
Expires: 1968-12-30
Abstract
No abstract record available.
Inventors
- 👤 Earnest J Dillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:54
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/121; G05D23/122; Y; Y10; Y10S; Y10S236/00; Y10S236/16; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7737; Y10T137/8376
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1646686A
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US1987032A
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US2100037A
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US2053974A
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US2353889A
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US2495226A
Cited
US2463598A
Cited
US2463599A
Cited
US2463600A
Cited
US2575100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |