Patent US3549351A successfully refreshed from Google Patents.
US3549351A
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US
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Method and apparatus for gas-solids reaction in production of sulfur,iron and related products
Assignee: HY MET ENG Ltd
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Filing: 1968-01-16
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Granted: 1970-12-22
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Expires: 1988-01-16
Abstract
No abstract record available.
Inventors
- 👤 Adloph Q Lundquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:28
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C21; C21B; C21B13/00; C21B15/00; C21B15/006; C22B1/02; F; F27; F27B; F27B7/00; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y10; Y10S; Y10S75/00; Y10S75/958
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1746945A
Cited
US1929502A
Cited
US1943337A
Cited
US1937661A
Cited
US2296498A
Cited
US3140940A
Cited
US3049422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |