Patent US2543602A successfully refreshed from Google Patents.
US2543602A
Expired / Lapsed
US
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Polymeric imido-esters prepared from maleic heteropolymers and bis-azolines
Assignee: Rohm and Haas Co
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Filing: 1949-12-30
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Granted: 1951-02-27
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Stanley P Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR THE PREPARATION OF A POLYMERIC IMIDO-ESTER WHICH COMPRISES CHEMICALLY REACTING, AT A TEMPERATURE FROM 20* C. TO 300* C.M A THERMOPLASTIC HETEROPOLYMER OF MALEIC ANHYDRIDE AND A MONOVINYLIDENE COMPOUND WITH A BIS-AZOLINE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
39 words
A PROCESS FOR THE PREPARATION OF A POLYMERIC IMIDO-ESTER WHICH COMPRISES CHEMICALLY REACTING, AT A TEMPERATURE FROM 20* C. TO 300* C.M A THERMOPLASTIC HETEROPOLYMER OF MALEIC ANHYDRIDE AND A MONOVINYLIDENE COMPOUND WITH A BIS-AZOLINE OF THE GENERAL 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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |