US3533739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion of sulfur-bearing carbonaceous fuel
Assignee: Black Sivalls and Bryson Inc
•
Filing: 1968-04-01
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Granted: 1970-10-13
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Expires: 1988-04-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene A Pelczarski
- 👤 James A Karnavas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:20
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/57; C01; C01B; C01B17/00; C01B17/02; C01B17/06; C01B32/00; C01B32/40; C10J3/72; C10J3/74; C10J3/76; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/0953; C10J2300/0956; C10J2300/12; C10J2300/1253; C10J2300/18; C10J2300/1807; C10J2300/1861; C10J2300/1884; C10J2300/1892
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1592860A
Cited
US2691573A
Cited
US2830883A
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US2824047A
Cited
US2953445A
Cited
US3249402A
Cited
US3402998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |