Patent US2716099A successfully refreshed from Google Patents.
US2716099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resins from alkyl phenol novolac resins
Assignee: Shell Development Co
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Filing: 1952-01-19
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Granted: 1955-08-23
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Expires: 1972-01-19
Abstract
No abstract record available.
Inventors
- 👤 Theodore F Bradley
- 👤 Herbert A Newey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:41
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR PRODUCTION OF AN EPOXY RESIN WHICH COMPRISES CONDENSING EPICHLORHYDRIN IN BASIC MEDIUM WITH NOVOLAC RESIN OF AN ALDEHYDE AND A MONONUCLEAR MONOHYDRIC ALKYLPHENOL CONTAINING AT LEAST 4 CARBON ATOMS IN THE ALKYL GROUP, WHICH NOVOLAC RESIN CONTAINS ABOUT 3 TO 12 PHENOLIC HYDROXYL GROUPS PER AVERAGE MOLECULE, SAID CONDENSATION BEING EFFECTED BY MIXING THE NOVOLAC RESIN WITH AT LEAST ABOUT 3 MOLS OF EPICHLORHYDRIN PER PHENOLIC HYDROXYL EQUIVALENT OF THE NOVOLAC RESIN AND REACTING THE MIXTURE AT ABOUT 60 TO 150* C. WITH ADDITION OF ABOUT ONE MOL OF AN ALKALI METAL HYDROXIDE PER PHENOLIC HYDROXYL EQUIVALENT OF THE NOVOLAC RESIN.
Claim 2
Dependent Claim
104 words
A PROCESS FOR PRODUCTION OF AN EPOXY RESIN WHICH COMPRISES CONDENSING EPICHLORHYDRIN IN BASIC MEDIUM WITH NOVOLAC RESIN OF AN ALDEHYDE AND A MONONUCLEAR MONOHYDRIC ALKYLPHENOL CONTAINING AT LEAST 4 CARBON ATOMS IN THE ALKYL GROUP, WHICH NOVOLAC RESIN CONTAINS ABOUT 3 TO 12 PHENOLIC HYDROXYL GROUPS PER AVERAGE MOLECULE, SAID CONDENSATION BEING EFFECTED BY MIXING THE NOVOLAC RESIN WITH AT LEAST ABOUT 3 MOLS OF EPICHLORHYDRIN PER PHENOLIC HYDROXYL EQUIVALENT OF THE NOVOLAC RESIN AND REACTING THE MIXTURE AT ABOUT 60 TO 150* C. WITH ADDITION OF ABOUT ONE MOL OF AN ALKALI METAL HYDROXIDE PER PHENOLIC HYDROXYL EQUIVALENT OF THE NOVOLAC RESIN.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |