US2567892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
furnace temperature regulator
Assignee: —
•
Filing: —
•
Granted: 1951-09-11
•
Expires: 1968-09-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:40
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/27; F; F23; F23L; F23L13/00; F23L13/02; F23N; F23N3/00; F23N3/04; G05D23/1906; F23N2225/00; F23N2225/08; F23N2235/00; F23N2235/02; F23N2235/06; F23N2235/12; F23N2235/14; F23N2235/16; F23N2241/00; F23N2241/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8359; Y10T137/8593; Y10T137/86493; Y10T137/86839
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |