US2554959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric imido-esters prepared from maleic anhydride heteropolymers and 2(11-hydroxy-8-heptadecenyl) oxazolines
Assignee: Rohm and Haas Co
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Filing: 1950-10-26
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Granted: 1951-05-29
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Expires: 1970-10-26
Abstract
No abstract record available.
Inventors
- 👤 Stanley P Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:53
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS FOR THE PREPARATION OF POLYMERIC IMIDO-ESTERS WHICH COMPRISES CHEMICALLY REACTING, AT A TEMPERATURE FROM 20* C. TO 300* C., A THERMOPLASTIC HETEROPOLYMER OF MALEIC ANHYDRIDE AND A MONOVINYLIDENE COMPOUND WITH AN OXAZOLINE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
38 words
A PROCESS FOR THE PREPARATION OF POLYMERIC IMIDO-ESTERS WHICH COMPRISES CHEMICALLY REACTING, AT A TEMPERATURE FROM 20* C. TO 300* C., A THERMOPLASTIC HETEROPOLYMER OF MALEIC ANHYDRIDE AND A MONOVINYLIDENE COMPOUND WITH AN OXAZOLINE OF THE GENERAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |