US3078235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid anhydride hardener compositions for epoxy resins
Assignee: 3M Co
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Filing: 1958-10-24
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Granted: 1963-02-19
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Expires: 1978-10-24
Abstract
No abstract record available.
Inventors
- 👤 Bowman Robert Laurence
- 👤 Hinkley James Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:31
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
FOR USE WITH LIQUID EPOXIDE RESINS IN THE PREPARETION OF LIQUID SELF-REACTIVE RESINOUS IMPREGANATING COMPOSITIONS HAVING MODERATELY PROLONGED POT LIFE, CURING TO A HARD TOUGH RESINOUS STATE, AND SUITABLE FOR FILLING AND ENCAPSULATING OF ELECTRICAL COILS AS HEREIN DESCRIBED, A LIQUID ANHYDRIDE HARDNER COMPOSITION CONSISTING ESSENTIALLY OF (A) THE SOLID ADDUCT OF ALLO-OCIMENE AND MALEIC ANHYDRIDE, (B) THE SOLID ADDUCT OF MYRCENE AND MALEIC ANHYDRIDE, AND (C) HEXAHYDROPHTALIC ANTHDRIDE, IN RELATIVE PROPORTIONS SELECTED TO PROVIDE A LIQUID AND FROM WITHIN THE APPROXIMATE LIMITS OF 20 TO 60 PARTS OF (A), 10 TO 80 PARTS OF (B), AND 0 TO 60 PARTS OF (C).
Claim 2
Dependent Claim
103 words
FOR USE WITH LIQUID EPOXIDE RESINS IN THE PREPARETION OF LIQUID SELF-REACTIVE RESINOUS IMPREGANATING COMPOSITIONS HAVING MODERATELY PROLONGED POT LIFE, CURING TO A HARD TOUGH RESINOUS STATE, AND SUITABLE FOR FILLING AND ENCAPSULATING OF ELECTRICAL COILS AS HEREIN DESCRIBED, A LIQUID ANHYDRIDE HARDNER COMPOSITION CONSISTING ESSENTIALLY OF (A) THE SOLID ADDUCT OF ALLO-OCIMENE AND MALEIC ANHYDRIDE, (B) THE SOLID ADDUCT OF MYRCENE AND MALEIC ANHYDRIDE, AND (C) HEXAHYDROPHTALIC ANTHDRIDE, IN RELATIVE PROPORTIONS SELECTED TO PROVIDE A LIQUID AND FROM WITHIN THE APPROXIMATE LIMITS OF 20 TO 60 PARTS OF (A), 10 TO 80 PARTS OF (B), AND 0 TO 60 PARTS OF (C).
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |