Patent US6228098B1 successfully refreshed from Google Patents.
US3067582A
Expired / Lapsed
US
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Method and apparatus for burning fuel at shear interface between coaxial streams of fuel and air
Assignee: Phillips Petroleum Co
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Filing: 1955-08-11
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Granted: 1962-12-11
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Expires: 1975-08-11
Abstract
No abstract record available.
Inventors
- 👤 Robert M Schirmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:18
CPC Classifications
F; F23; F23C; F23C1/00; F23C7/00; F23C7/002; F23R; F23R3/00; F23R3/02; F23R3/04; F23R3/10; F23R3/12; F23R3/14
Claims Analysis
Total Claims: 0
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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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |