Patent US771786A successfully refreshed from Google Patents.
Patent US2981754A successfully refreshed from Google Patents.
US2981754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing 2, 2, 3, 3-tetrachloro1, 4-butanediol
Assignee: GAF Chemicals Corp
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Filing: 1955-11-23
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Granted: 1961-04-25
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Expires: 1975-11-23
Abstract
No abstract record available.
Inventors
- 👤 Wynn Robert Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:27
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS COMPRISING SUBJECTING 2-BUTYNE-1,4-DIOL TO THE ACTION OF AN AMOUNT OF GASEOUS CHLORINE AT LEAST ABOUT 25% IN EXCESS OF THAT THEORETICALLY REQUIRED TO SATURATE SAID 2-BUTYNE-1,4-DIOL, IN AN INERT AROMATIC HYDROCARBON LIQUID MEDIUM AND IN THE PRESENCE OF A WEAK ACID ACCEPTOR.
Claim 2
Dependent Claim
44 words
A PROCESS COMPRISING SUBJECTING 2-BUTYNE-1,4-DIOL TO THE ACTION OF AN AMOUNT OF GASEOUS CHLORINE AT LEAST ABOUT 25% IN EXCESS OF THAT THEORETICALLY REQUIRED TO SATURATE SAID 2-BUTYNE-1,4-DIOL, IN AN INERT AROMATIC HYDROCARBON LIQUID MEDIUM AND IN THE PRESENCE OF A WEAK ACID ACCEPTOR.
References Cited (Backward Citations)
US2648702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |