Patent US5772669A successfully refreshed from Google Patents.
US2941981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing agents comprising amine-polyborate esters for epoxy resins
Assignee: Westinghouse Electric Corp
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Filing: 1958-07-17
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Granted: 1960-06-21
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Expires: 1978-07-17
Abstract
No abstract record available.
Inventors
- 👤 Irving N Elbling
- 👤 William R Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:13
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/70; C08G59/40; C08G59/4007; C08G59/4078; C08G59/4092
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A COMPOSITION OF MATTER COMPRISING AN ADMIXTURE OF (1) THE REACTION PRODUCT DERIVED BY HEATING THE REACTING (A) AN EPIHALOHYDRIN AND (B) AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIHYDRIC PHENOLS AND THE CONDENSATION PRODUCT OF A MONOMUCLEAR MONOHYDRIC ALKYL PHENOL CONTAINING AT LEAST FOUR CARBON ATOMS IN THE ALKYL GROUP AND AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE, ACETALDEHYDE, CHLORALDEHYDE, BUTYRALDEHYDE, AND FURFURALDEHYDE AND (2) FROM 2% TO 25% BASED ON THE WEIGHT OF (1) OF A CURING CATALYST COMPRISED OF AN ADMIXTURE OF (A) FROM 1 TO 2 MOLS OF AT LEAST ONE POLYBORATE ESTER SELECTED FROM THE GROUP CONSISTING OF:
Claim 2
Dependent Claim
108 words
A COMPOSITION OF MATTER COMPRISING AN ADMIXTURE OF (1) THE REACTION PRODUCT DERIVED BY HEATING THE REACTING (A) AN EPIHALOHYDRIN AND (B) AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIHYDRIC PHENOLS AND THE CONDENSATION PRODUCT OF A MONOMUCLEAR MONOHYDRIC ALKYL PHENOL CONTAINING AT LEAST FOUR CARBON ATOMS IN THE ALKYL GROUP AND AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE, ACETALDEHYDE, CHLORALDEHYDE, BUTYRALDEHYDE, AND FURFURALDEHYDE AND (2) FROM 2% TO 25% BASED ON THE WEIGHT OF (1) OF A CURING CATALYST COMPRISED OF AN ADMIXTURE OF (A) FROM 1 TO 2 MOLS OF AT LEAST ONE POLYBORATE ESTER SELECTED FROM THE GROUP CONSISTING OF:
References Cited (Backward Citations)
US2741548A
Cited
US2809184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |