US2428642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control system
Assignee: General Electric Co
•
Filing: 1946-04-27
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Granted: 1947-10-07
•
Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Walter R Weeks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:06
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/27537
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1875851A
Cited
DE622282C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |