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US2817645A
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Reaction of polyvinylphthalimides and alkylene polyamines and products thereof
Assignee: Hercules Powder Co
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Filing: 1954-06-30
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Granted: 1957-12-24
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Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 Cyrus A Weisgerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:20
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/12; C02F1/00; C02F1/52; C02F1/54; C08; C08C; C08C1/00; C08C1/14; C08C1/15; C08F; C08F8/00; C08F8/30; C08F8/32; Y; Y10; Y10S; Y10S528/00; Y10S528/931; Y10S528/934; Y10S528/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PROCESS FOR PREPARING WATER-SOLUBLE RECTION PRODUCTS WHICH COMPRISES REACTING A POLYMER OF AN NVINYLIMIDE OF A DICARBOXYLIC ACID IN CONTACT WITH AN ALKYLENE POLYAMINE POLYAMINE AT ABOUT 100*C. TO ABOUT 300*C.
Claim 2
Dependent Claim
32 words
A PROCESS FOR PREPARING WATER-SOLUBLE RECTION PRODUCTS WHICH COMPRISES REACTING A POLYMER OF AN NVINYLIMIDE OF A DICARBOXYLIC ACID IN CONTACT WITH AN ALKYLENE POLYAMINE POLYAMINE AT ABOUT 100*C. TO ABOUT 300*C.
References Cited (Backward Citations)
US2566250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |