Patent US5666512A successfully refreshed from Google Patents.
Patent US3526478A successfully refreshed from Google Patents.
US3526478A
Expired / Lapsed
US
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Generation of hydrogen from sulfurbearing carbonaceous fuel
Assignee: Black Sivalls and Bryson Inc
•
Filing: 1968-11-01
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Granted: 1970-09-01
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Expires: 1988-11-01
Abstract
No abstract record available.
Inventors
- 👤 Eugene A Pelczarski
- 👤 James A Karnavas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:17
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB226500A
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US2270897A
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US2830883A
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US2824047A
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US2953443A
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US3074783A
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US3188179A
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US3115394A
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US3402998A
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US3382044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-31 | 1974-03-02 | 1974-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-31 | 1978-03-02 | 1978-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-31 | 1982-03-02 | 1982-09-01 | $7700.00 | Window Closed / Lapsed |