Patent EP0168559A1 successfully refreshed from Google Patents.
US2610202A
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Esters of polymers of maleic anhydride and beta-mercaptoethanol and process
Assignee: Monsanto Chemicals Ltd
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Filing: 1949-06-24
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Granted: 1952-09-09
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Expires: 1969-06-24
Abstract
No abstract record available.
Inventors
- 👤 Kosmin Milton
- 👤 Butler John Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:39
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/20; C10M135/22; C10M135/26; C07; C07C; C07C323/00; C08; C08G; C08G75/00; C08G75/26; C10M135/24; C10M2221/00; C10M2221/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A COMPOSITION OF MATTER MADE BY THE ESTERIFICATION OF POLYLMERS OF MALEIC ANHYDRIDE AND B-MERCAPTOETHANOL WITH PRIMARY NORMAL ALCOHOLS HAVING FROM TWELVE TO EIGHTEEN CARBON ATOMSL SAID POLYMERS CONTAINING AN AVERAGE OF AT LEAST TWO MALEIC ANHYDRIDE UNITS PER MOLECULE.
Claim 2
Dependent Claim
40 words
A COMPOSITION OF MATTER MADE BY THE ESTERIFICATION OF POLYLMERS OF MALEIC ANHYDRIDE AND B-MERCAPTOETHANOL WITH PRIMARY NORMAL ALCOHOLS HAVING FROM TWELVE TO EIGHTEEN CARBON ATOMSL SAID POLYMERS CONTAINING AN AVERAGE OF AT LEAST TWO MALEIC ANHYDRIDE UNITS PER MOLECULE.
References Cited (Backward Citations)
US2477327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |