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Patent US2964557A successfully refreshed from Google Patents.
US2964557A
Expired / Lapsed
US
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Method for preparing salts of sulfoalkyl methacrylates
Assignee: Rohm and Haas Co
•
Filing: 1958-03-13
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Granted: 1960-12-13
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Expires: 1978-03-13
Abstract
No abstract record available.
Inventors
- 👤 Warren D Niederhauser
- 👤 Broderick Edward
- 👤 Franklin F Owings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:19
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A METHOD FOR THE PREPARATION OF A COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
11 words
A METHOD FOR THE PREPARATION OF A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
DE867396C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |