Patent US1655435A successfully refreshed from Google Patents.
US1655435A
Expired / Lapsed
US
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Process of producing acetone and butyl alcohol by fermentation
Assignee: Commercial Solvents Corp
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Filing: 1923-05-29
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Granted: 1928-01-10
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Expires: 1943-05-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin F Pike
- 👤 Henry F Smyth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:32
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/24; C12P7/26; C12P7/28; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/842
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-01-09 | 1931-07-11 | 1932-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-01-09 | 1935-07-11 | 1936-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-01-09 | 1939-07-11 | 1940-01-10 | $7700.00 | Window Closed / Lapsed |