US3042769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid fuel flow control system for forced draft heating units
Assignee: NORMAN PRODUCTS Co
•
Filing: 1960-10-13
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Granted: 1962-07-03
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Expires: 1980-10-13
Abstract
No abstract record available.
Inventors
- 👤 Ned G Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:08
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/14; F23N5/146; F23N1/00; F23N1/06; F23N1/065; F23N5/18; F23N5/188; F23N2225/00; F23N2225/02; F23N2233/00; F23N2233/02; F23N2235/00; F23N2235/12; F23N2235/20; F23N2235/22; F23N2235/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1914949A
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US2468768A
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US2598556A
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US2971530A
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US2922002A
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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) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |