US2906723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin compositions of improved heat hardening characteristics and the process of their production
Assignee: Hoechst AG Werk Kalle Albert
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Filing: 1955-12-13
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Granted: 1959-09-29
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Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Reese Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:04
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/184; C08G59/40; C08G59/50; C08G59/5006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
AN ADDUCT OF AN ALKYLENE POLYAMINE OF 2-3 CARBON ATOMS IN THE ALKYLENE RADICAL WITH AN EPOXY RESIN HAVING AN EPOXY-EQUIVALENT LESS THAN 1 DERIVED FROM A DIHYDROXYPHENOL AND 0.5 TO 0.9 MOLAR PROPORTION OF A HALOGENHYDRIN SELECTED FROM THE GROUP CONSISTING OF EPIAND DIHALOGENHYDRINS.
Claim 2
Dependent Claim
45 words
AN ADDUCT OF AN ALKYLENE POLYAMINE OF 2-3 CARBON ATOMS IN THE ALKYLENE RADICAL WITH AN EPOXY RESIN HAVING AN EPOXY-EQUIVALENT LESS THAN 1 DERIVED FROM A DIHYDROXYPHENOL AND 0.5 TO 0.9 MOLAR PROPORTION OF A HALOGENHYDRIN SELECTED FROM THE GROUP CONSISTING OF EPIAND DIHALOGENHYDRINS.
Claim 3
Dependent Claim
74 words
A HEAT HARDENABLE EPOXY RESIN COMPOSITION CONTAINING (1) AN EPOXY RESIN HAVING AN EPOXY-EQUIVALENT GREATER THAN 1 DERIVED FROM A DIHYDROXYPHENOL AND A HALOGEN HYDRIN AND (2), AS A HARDENING AGENT FOR SAID EPOXY RESIN, AN ADDUCT OF AN ALKYLENE POLYAMINE HARDENING AGENT FOR AN EPOXY RESIN AND AN EPOXY RESIN HAVING AN EPOXYEQUIVALENT LESS THAN 1 DERIVED FROM A DIHYDROXYPHENOL AND A HALOGEN HYDRIN REACTED IN A MOLAR RATIO OF 1:05 TO 0.9.
Claim 4
Dependent Claim
74 words
A HEAT HARDENABLE EPOXY RESIN COMPOSITION CONTAINING (1) AN EPOXY RESIN HAVING AN EPOXY-EQUIVALENT GREATER THAN 1 DERIVED FROM A DIHYDROXYPHENOL AND A HALOGEN HYDRIN AND (2), AS A HARDENING AGENT FOR SAID EPOXY RESIN, AN ADDUCT OF AN ALKYLENE POLYAMINE HARDENING AGENT FOR AN EPOXY RESIN AND AN EPOXY RESIN HAVING AN EPOXYEQUIVALENT LESS THAN 1 DERIVED FROM A DIHYDROXYPHENOL AND A HALOGEN HYDRIN REACTED IN A MOLAR RATIO OF 1:05 TO 0.9.
References Cited (Backward Citations)
GB691543A
Cited
US2767157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |