US2491324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary burner
Assignee: Phillips Petroleum Co
•
Filing: 1945-12-11
•
Granted: 1949-12-13
•
Expires: 1965-12-11
Abstract
No abstract record available.
Inventors
- 👤 Carl J Maki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/04; F23D2900/00; F23D2900/14; F23D2900/14005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1105290A
Cited
US2112888A
Cited
US2177245A
Cited
US2327512A
Cited
US2276960A
Cited
US2351421A
Cited
US2344936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |