US2803309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for eliminating products of combustion
Assignee: Individual
•
Filing: 1956-01-17
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Granted: 1957-08-20
•
Expires: 1976-01-17
Abstract
No abstract record available.
Inventors
- 👤 Oswell A Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:31
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/06; F04; F04D; F04D25/00; F04D25/16; F04D25/166; F04D29/00; F04D29/70; F04D29/701; F23G; F23G7/00; F23G7/06; F23J1/00; F23J15/02; F23J15/022; F23J15/027; F23J2700/00; F23J2700/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |