US2993646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined temperature regulator and flame failure control
Assignee: Robertshaw Controls Co
•
Filing: 1958-08-22
•
Granted: 1961-07-25
•
Expires: 1978-08-22
Abstract
No abstract record available.
Inventors
- 👤 Wilbur F Jackson
- 👤 Theodore J Dykzeul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:23
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/06; F23N5/067; F23N5/10; F23N5/107; G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126; G05D23/127; G05D23/128; F23N2235/00; F23N2235/12; F23N2235/20; F23N2235/24; Y; Y10; Y10S; Y10S236/00; Y10S236/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1972172A
Cited
US2604266A
Cited
US2690875A
Cited
US2724409A
Cited
US2857103A
Cited
US2702052A
Cited
US2825507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |