Patent US2547906A successfully refreshed from Google Patents.
US2547906A
Expired / Lapsed
US
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Process for preparing alkane sulfonic acids
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-02-24
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Granted: 1951-04-03
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Expires: 1968-02-24
Abstract
No abstract record available.
Inventors
- 👤 John K Fincke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:51
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE PROCESS FOR PRODUCING ALKANE SULFONIC ACIDS WHICH COMPRISES TREATING B-(ALKYL MERCAPTO) ETHANOL WITH NITRIC ACID AT A TEMPERATURE AT WHICH NITROGEN PEROXIDE IS EVOLVED AND THE -C2H4OH GROUP PRESENT THEREIN IS OXIDIZED AND RECOVERING ALKANE SULFONIC ACIDS FROM THE REACTION PRODUCT.
Claim 2
Dependent Claim
42 words
THE PROCESS FOR PRODUCING ALKANE SULFONIC ACIDS WHICH COMPRISES TREATING B-(ALKYL MERCAPTO) ETHANOL WITH NITRIC ACID AT A TEMPERATURE AT WHICH NITROGEN PEROXIDE IS EVOLVED AND THE -C2H4OH GROUP PRESENT THEREIN IS OXIDIZED AND RECOVERING ALKANE SULFONIC ACIDS FROM THE REACTION PRODUCT.
References Cited (Backward Citations)
US1925191A
Cited
US1966187A
Cited
US2204210A
Cited
US2346102A
Cited
US2374983A
Cited
US2338830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |