US3271476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable mixtures of epoxy resins and polyanhydrides or polycarboxylic acids
Assignee: BASF Schweiz AG
•
Filing: 1963-02-28
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Granted: 1966-09-06
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Expires: 1983-02-28
Abstract
No abstract record available.
Inventors
- 👤 Widmer Franz Rudolf
- 👤 Renner Alfred
- 👤 Orth Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:47
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/423; C08G59/4215; C08L; C08L63/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A THERMO-CURABLE RESIN COMPOSITION OF MATTER, WHICH COMPRISES (1) A 1:2-EPOXY COMPOUND AND (2) AS CURING AGENT A POLYANHYDRIDE OBTAINED BY REACTING AT MOST N MOLECULAR PROPORTIONS OF AN UNSATURATED DICARBOXYLIC ACID ANHYDRIDE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF FORMULA
Claim 2
Dependent Claim
42 words
A THERMO-CURABLE RESIN COMPOSITION OF MATTER, WHICH COMPRISES (1) A 1:2-EPOXY COMPOUND AND (2) AS CURING AGENT A POLYANHYDRIDE OBTAINED BY REACTING AT MOST N MOLECULAR PROPORTIONS OF AN UNSATURATED DICARBOXYLIC ACID ANHYDRIDE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF FORMULA
Claim 3
Dependent Claim
48 words
A THERMOCURABLE ADHESIVE COMPOSITION, WHICH COMPRISES (1) A 1,2-EPOXY COMPOUND HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1; (2) AS CURING AGENT THE REACTION PRODUCT OF LESS THAN 2 MOLECULAR PROPORTIONS MALEIC ACID ANHYDRIDE WITH 1 MOLECULAR PROPORTIONS OF 1,4-BIS(CRYCLOPENTADIENYL)-BUTENE-(2); (3) AN UNSATURATED POLYESTER; AND (4) AN INORGANIC FILLER.
Claim 4
Dependent Claim
48 words
A THERMOCURABLE ADHESIVE COMPOSITION, WHICH COMPRISES (1) A 1,2-EPOXY COMPOUND HAVING A 1,2-EPOXY EQUIVALENCY GREATER THAN 1; (2) AS CURING AGENT THE REACTION PRODUCT OF LESS THAN 2 MOLECULAR PROPORTIONS MALEIC ACID ANHYDRIDE WITH 1 MOLECULAR PROPORTIONS OF 1,4-BIS(CRYCLOPENTADIENYL)-BUTENE-(2); (3) AN UNSATURATED POLYESTER; AND (4) AN INORGANIC FILLER.
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |