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Patent US2450585A successfully refreshed from Google Patents.
US2450585A
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Sulfonation process
Assignee: Standard Oil Co
•
Filing: 1943-05-27
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Granted: 1948-10-05
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Expires: 1963-05-27
Abstract
No abstract record available.
Inventors
- 👤 Ouville Edmond L D
- 👤 Donald E Burney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:41
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1901507A
Cited
US1787408A
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GB416379A
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US2233408A
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US2256610A
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US2267725A
Cited
US2232117A
Cited
US2232118A
Cited
US2364782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-05 | 1952-04-05 | 1952-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-05 | 1956-04-05 | 1956-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-05 | 1960-04-05 | 1960-10-05 | $7700.00 | Window Closed / Lapsed |