US2957758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control for pulverized coal gasification
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1958-06-18
•
Granted: 1960-10-25
•
Expires: 1978-06-18
Abstract
No abstract record available.
Inventors
- 👤 Taniyama Toshio
- 👤 Saeki Osamu
- 👤 Karato Yoshiichi
- 👤 Usamoto Teruyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:35
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/72; C10J3/02; C10J3/20; C10J3/723; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0953; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/18; C10J2300/1846
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563460A
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US2664402A
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US2650154A
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US2683656A
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US2667410A
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US2701755A
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US2702238A
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US2716598A
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US2769693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |