US3838140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molecular weight regulation in chloroprene polymers
Assignee: Bayer AG
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Filing: 1972-11-09
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Granted: 1974-09-24
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Expires: 1992-11-09
Abstract
Abstract A PROCESS FOR POLYMERISING A MONOMER COMPOSITION OF CHLOROPRENE AND 0 TO 50% BY WEIGHT OF ONE OR MORE OTHER COPOLYMERISABLE MONOMERS IN AQUEOUS EMULSION ON RADICAL FORMING CATALYSTS IN THE PRESENCE OF A SELECTED DIALKOXYXANTHATE DISULPHIDE AND A MIXTURE OF THE POLYMER THUS OBTAINED WITH A BENZENE INSOLUBLE CROSS-LINKED CHLOROPRENE POLYMER.
Inventors
- 👤 Mader R Mayer
- 👤 J Boldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:24
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/14; C08F236/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |