Patent US2813898A successfully refreshed from Google Patents.
US2813898A
Expired / Lapsed
US
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Sulfonium sulfonates
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-09-13
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Granted: 1957-11-19
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Expires: 1975-09-13
Abstract
No abstract record available.
Inventors
- 👤 Van R Gaertner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:46
CPC Classifications
C; C07; C07C; C07C381/00; C07C381/12; Y; Y10; Y10S; Y10S260/00; Y10S260/15
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
SULFONIUM SULFONATES OF THE FORMULA
Claim 2
Dependent Claim
5 words
SULFONIUM SULFONATES OF THE FORMULA
Claim 3
Independent Claim
11 words
THE METHOD WHICH COMPRISES CONTACTING A MERCAPTO ALKANESULFONATE OF THE FORMULAA
Claim 4
Independent Claim
11 words
THE METHOD WHICH COMPRISES CONTACTING A MERCAPTO ALKANESULFONATE OF THE FORMULAA
References Cited (Backward Citations)
US2185654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |