US3476494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vortex burner
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1967-08-29
•
Granted: 1969-11-04
•
Expires: 1987-08-29
Abstract
No abstract record available.
Inventors
- 👤 William L Buchanan
- 👤 Harry F Straight Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:51
CPC Classifications
F; F23; F23C; F23C3/00; F23C3/006; F23C7/00; F23C7/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2126853A
Cited
US2202524A
Cited
US2806517A
Cited
US2725929A
Cited
US3014523A
Cited
US3118489A
Cited
FR1360069A
Cited
US3266549A
Cited
US3327762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |