US3225013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable compositions of an organic acid anhydride and an alkylenimine derivative
Assignee: 3M Co
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Filing: 1964-10-12
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Granted: 1965-12-21
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Expires: 1984-10-12
Abstract
No abstract record available.
Inventors
- 👤 Fram Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:03
CPC Classifications
C; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08; C07D203/12; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/553; C07F9/564; C08; C08G; C08G73/00; C08G73/02; C08G73/028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
AN ESSENTIALLY ANHYDROUS, ACTIVE HYDROGEN FREE, ROOM TEMPERATURE STABLE ADMIXTURE CONSISTING ESSENTIALLY OF AN ORGANIC ACID ANHYDRIDE OF A POLYCARBOXYLIC ACID AS ONE REACTANT AND, AS THE OTHER REACTANT, FROM ABOUT STOICHIOMETRIC AMOUNT TO ABOUT 50% EXCESS OF AN AZIRANE RING CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF: (1) A PHOSPHINE OXIDE HAVING, AS THE SOLE GROUPS CAPABLE OF REACTING WITH ANHYDRIDE, FROM 2 TO 3 RADICALS OF THE FORMULA (2) A PHOSPHINE SULFIDE HAVING, AS THE SOLE GROUP CAPABLE OF REACTING WITH ANHYDRIDE, FROM 2 TO 3 RADICALS OF THE FORMULA
Claim 2
Dependent Claim
93 words
AN ESSENTIALLY ANHYDROUS, ACTIVE HYDROGEN FREE, ROOM TEMPERATURE STABLE ADMIXTURE CONSISTING ESSENTIALLY OF AN ORGANIC ACID ANHYDRIDE OF A POLYCARBOXYLIC ACID AS ONE REACTANT AND, AS THE OTHER REACTANT, FROM ABOUT STOICHIOMETRIC AMOUNT TO ABOUT 50% EXCESS OF AN AZIRANE RING CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF: (1) A PHOSPHINE OXIDE HAVING, AS THE SOLE GROUPS CAPABLE OF REACTING WITH ANHYDRIDE, FROM 2 TO 3 RADICALS OF THE FORMULA (2) A PHOSPHINE SULFIDE HAVING, AS THE SOLE GROUP CAPABLE OF REACTING WITH ANHYDRIDE, FROM 2 TO 3 RADICALS OF THE 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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |