Patent US2587329A successfully refreshed from Google Patents.
US2587329A
Expired / Lapsed
US
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Amides of alkylenimines and beta-keto acids and process of producing the same
Assignee: GAF Chemicals Corp
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Filing: 1946-12-05
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Granted: 1952-02-26
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Expires: 1966-12-05
Abstract
No abstract record available.
Inventors
- 👤 Giffin D Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:22
CPC Classifications
C; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08; C08; C08G; C08G73/00; C08G73/02; C08G73/0233; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C7/00; G03C7/30; G03C7/32; G03C7/327
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
THE PROCESS OF PRODUCING A WATER-SOLUBLE THERMO-REVERSIBLE GEL-FORMING MATERIAL, WHICH COMPRISES ACYLATING A 1,2 ALKYLENIMINE WITH SUBSTANTIALLY LESS THAN AN EQUIVALENT AMOUNT OF DIKETENE.
Claim 2
Dependent Claim
24 words
THE PROCESS OF PRODUCING A WATER-SOLUBLE THERMO-REVERSIBLE GEL-FORMING MATERIAL, WHICH COMPRISES ACYLATING A 1,2 ALKYLENIMINE WITH SUBSTANTIALLY LESS THAN AN EQUIVALENT AMOUNT OF DIKETENE.
Claim 3
Dependent Claim
27 words
A THERMO-REVERSIBLE GEL-FORMING MATERIAL COMPRISING A WATER-SOLUBLE ACETOACETAMIDE OF A POLYETHYLENIMINE IN WHICH ONLY A MINOR PORTION OF THE SECONDARY AMINO GROUPS OF THE POLYETHYLENIMINE ARE ACYLATED.
Claim 4
Dependent Claim
27 words
A THERMO-REVERSIBLE GEL-FORMING MATERIAL COMPRISING A WATER-SOLUBLE ACETOACETAMIDE OF A POLYETHYLENIMINE IN WHICH ONLY A MINOR PORTION OF THE SECONDARY AMINO GROUPS OF THE POLYETHYLENIMINE ARE ACYLATED.
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) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |