Patent US3372142A successfully refreshed from Google Patents.
US3372142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxidation process
Assignee: Dow Chemical Co
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Filing: 1964-01-31
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Granted: 1968-03-05
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Expires: 1984-01-31
Abstract
No abstract record available.
Inventors
- 👤 Douglas R Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:22
CPC Classifications
C; C08; C08G; C08G59/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
THE PROCESS OF EPOXIDIZING A VICINAL CHLOROHYDRIN COMPOUND BY DEHYDROCHLORINATING SAID COMPOUND IN THE PRESENCE OF AN AQUEOUS SOLUTION OF BETWEEN 1.5 AND 5.5 N ALKALI METAL HYDROXIDE AND SUBSTANTIALLY SATURATED WITH AN ALKALI METAL CARBONATE.
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |