US3454481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sulphonic acids with actinic radiation
Assignee: British Hydrocarbon Chemicals Ltd
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Filing: 1965-05-20
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Granted: 1969-07-08
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Expires: 1985-05-20
Abstract
No abstract record available.
Inventors
- 👤 Stanley Frederic Marrian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:14
CPC Classifications
C; C07; C07C; C07C309/00; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; Y; Y10; Y10S; Y10S204/00; Y10S204/902; Y10S204/903; Y10S204/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE PRODUCTION OF ALKANE SULPHONIC ACIDS WHICH COMPRISES IRRADIATING A PARAFFIN, FREE FROM ADDED PERACID, WITH ACTINIC RADIATION IN THE PRESENCE OF SULPHUR DIOXIDE, OXYGEN, AND BETWEEN 0.01 AND 10% BY WEIGHT, BASED ON THE PARAFFIN, OF A MONO-CARBOXYLIC ACID FREE FROM ETHYLENIC UNSATURATION AND HAVING AT LEAST TWO CARBON ATOMS IN THE MOLECULE.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE PRODUCTION OF ALKANE SULPHONIC ACIDS WHICH COMPRISES IRRADIATING A PARAFFIN, FREE FROM ADDED PERACID, WITH ACTINIC RADIATION IN THE PRESENCE OF SULPHUR DIOXIDE, OXYGEN, AND BETWEEN 0.01 AND 10% BY WEIGHT, BASED ON THE PARAFFIN, OF A MONO-CARBOXYLIC ACID FREE FROM ETHYLENIC UNSATURATION AND HAVING AT LEAST TWO CARBON ATOMS IN THE MOLECULE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |