Patent US2848435A successfully refreshed from Google Patents.
US2848435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of epoxy resins
Assignee: Shell Development Co
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Filing: 1955-03-28
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Granted: 1958-08-19
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Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Leonard H Griffin
- 👤 James H Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:53
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1444
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR THE PRODUCTION OF GLYCIDYL ETHER OF A POLYHYDRIC PHENOL WHICH COMPRISES REACTING A POLYHYDRIC PHENOL THE SODIUM AND POTASSIUM SALTS OF WHICH ARE SOLUBLE IN THE HEREINAFTER DESCRIBED SECONDARY ALCOHOL WITH MORE THAN 0.5 MOLE OF EPIHALOHYDRIN PER PHENOLIC HYDROXYL EQUIVALENT WEIGHT OF THE SAID POLYHYDRIC PHENOL AND AN ALKALI METAL HYDROXIDE OF THE GROUP CONSISTING OF SODIUM AND POTASSIUM HYDROXIDE IN THE PRESENCE OF AN ALIPHATIC SECONDARY MONOHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ISOPROPYL ALCOHOL, 2-BUTANOL AND METHYL ISOBUTYL CARBINOL.
Claim 2
Dependent Claim
86 words
A PROCESS FOR THE PRODUCTION OF GLYCIDYL ETHER OF A POLYHYDRIC PHENOL WHICH COMPRISES REACTING A POLYHYDRIC PHENOL THE SODIUM AND POTASSIUM SALTS OF WHICH ARE SOLUBLE IN THE HEREINAFTER DESCRIBED SECONDARY ALCOHOL WITH MORE THAN 0.5 MOLE OF EPIHALOHYDRIN PER PHENOLIC HYDROXYL EQUIVALENT WEIGHT OF THE SAID POLYHYDRIC PHENOL AND AN ALKALI METAL HYDROXIDE OF THE GROUP CONSISTING OF SODIUM AND POTASSIUM HYDROXIDE IN THE PRESENCE OF AN ALIPHATIC SECONDARY MONOHYDRIC ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ISOPROPYL ALCOHOL, 2-BUTANOL AND METHYL ISOBUTYL CARBINOL.
References Cited (Backward Citations)
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US2567842A
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US2659710A
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US2752269A
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US2742448A
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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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |