US3223681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer compositions from an alkylenimine derivative, a dicarboxylic acid anhydride and water
Assignee: 3M Co
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Filing: 1960-10-24
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Granted: 1965-12-14
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Expires: 1980-10-24
Abstract
No abstract record available.
Inventors
- 👤 George M Rambosek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:56
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A CURING PROCESS WHICH COMPRISES CONTACTING WITH WATER AT ABOUT ROOM TEMPERATURE AN ESSENTIALLY ANHYDROUS AND NORMALLY STABLE ADMIXTURE CONSISTING ESSENTIALLY OF AN ORGANIC ACID ANHYDIDE WHICH YIELDS AT LEAST A DIBASIC CARBOXYLIC ACID UPON HYDROLYSIS AND AN ALKYLENIMINE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
46 words
A CURING PROCESS WHICH COMPRISES CONTACTING WITH WATER AT ABOUT ROOM TEMPERATURE AN ESSENTIALLY ANHYDROUS AND NORMALLY STABLE ADMIXTURE CONSISTING ESSENTIALLY OF AN ORGANIC ACID ANHYDIDE WHICH YIELDS AT LEAST A DIBASIC CARBOXYLIC ACID UPON HYDROLYSIS AND AN ALKYLENIMINE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |