Patent US2844608A successfully refreshed from Google Patents.
US2844608A
Expired / Lapsed
US
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Sulfodicarboxylic acid compounds
Assignee: Bayer AG
•
Filing: 1954-01-25
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Granted: 1958-07-22
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Expires: 1974-01-25
Abstract
No abstract record available.
Inventors
- 👤 Hagge Walter
- 👤 Quaedvlieg Mathieu
- 👤 Hempel Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:53
CPC Classifications
C; C07; C07C; C07C311/00; C07C311/01; C07C311/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
7 words
SULFODICARBOXYLIC ACID COMPOUNDS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
SULFODICARBOXYLIC ACID COMPOUNDS OF THE GENERAL FORMULA
Claim 3
Dependent Claim
24 words
PROCESS FOR THE PRODUCTION OF SULFOCARBOXYLIC ACID COMPOUNDS OF THE GENERAL FORMULA INDICATED IN CLAIM 1. WHICH COMPRISES REACTING MALEIC ANHYDRIDE OF THE FORMULA
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |