US2787318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burner with tangential air admission and restricted throat
Assignee: Individual
•
Filing: 1949-11-04
•
Granted: 1957-04-02
•
Expires: 1969-11-04
Abstract
No abstract record available.
Inventors
- 👤 John J Wolfersperger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:25
CPC Classifications
F; F23; F23C; F23C99/00; F23C2700/00; F23C2700/02; F23C2700/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1603032A
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GB408030A
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US2304294A
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US2284906A
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US2206553A
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US2368827A
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US2485656A
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US2445466A
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US2433317A
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US2500787A
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US2499207A
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US2516063A
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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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |