US2948761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of chloroprene
Assignee: Distillers Co Yeast Ltd
•
Filing: 1958-11-18
•
Granted: 1960-08-09
•
Expires: 1978-11-18
Abstract
No abstract record available.
Inventors
- 👤 Jenkins Philip Aldwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:21
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25; C07C17/38; C07C17/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR THE PRODUCTION OF CHLOROPRENE WHICH COMPRISES HEATING 3:4-DICHLORBUTENE-1 WITH AN AQUEOUS SOLUTION OF ALKALI IN THE PRESENCE OF A SUBSTANCE FURNISHING THIOCYANATE IONS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL THIOCYANATES.
Claim 2
Dependent Claim
39 words
A PROCESS FOR THE PRODUCTION OF CHLOROPRENE WHICH COMPRISES HEATING 3:4-DICHLORBUTENE-1 WITH AN AQUEOUS SOLUTION OF ALKALI IN THE PRESENCE OF A SUBSTANCE FURNISHING THIOCYANATE IONS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL THIOCYANATES.
References Cited (Backward Citations)
US2108390A
Cited
US2430016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |