US3137681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process and product
Assignee: Polysar Ltd
•
Filing: 1956-11-07
•
Granted: 1964-06-16
•
Expires: 1976-11-07
Abstract
No abstract record available.
Inventors
- 👤 Robert J Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:40
CPC Classifications
C; C08; C08F; C08F293/00; C08F36/00; C08F36/02; C08F36/04; C08F4/00; C08F4/28; C08F4/32; C08F4/40; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
ISOLATABLE POLYMERS CHARACTERIZED BY THEIR ABILITY TO PRODUCE BLOCK POLYMERS FREE OF GRAFT COPOLYMERS AND HOMOPOLYMERS AND COMPRISING POLYMERIC CHAINS HAVING A HYDROPEROXIDE GROUP AT EACH END THEREOF, THE POLYMERIC CHAIN BEING SELECTED FROM THE GROUP CONSISTING OF POLYBUTADIENE, POLYSTRENE, POLYCHLOROSTYRENE, POLYMETHYL METHACRYLATE, POLYVINYL PYRIDINE, ISOPRENE/STYRENE COPOLYMER, BUTADIENE-1,3/ALPHA-METHYLSTYRENE COPOLYMER, BUTA DIENE-1,3/CHLOROSTYRENE COPOLYMER, BUTADIENE-1,3/METHYL METHACRYLATE COPOLYMER, BUTADIENE-1,3/ACRYLAMIDE COPOLYMER, BUTADIENE-1,3/VINYL PYRIDINE COPOLYMER, BUTADIENE-1,3/ACRYLONITRILE COPOLYMER AND BUTADIENE-1,3/STYRENE COPOLYMER.
Claim 2
Dependent Claim
65 words
ISOLATABLE POLYMERS CHARACTERIZED BY THEIR ABILITY TO PRODUCE BLOCK POLYMERS FREE OF GRAFT COPOLYMERS AND HOMOPOLYMERS AND COMPRISING POLYMERIC CHAINS HAVING A HYDROPEROXIDE GROUP AT EACH END THEREOF, THE POLYMERIC CHAIN BEING SELECTED FROM THE GROUP CONSISTING OF POLYBUTADIENE, POLYSTRENE, POLYCHLOROSTYRENE, POLYMETHYL METHACRYLATE, POLYVINYL PYRIDINE, ISOPRENE/STYRENE COPOLYMER, BUTADIENE-1,3/ALPHA-METHYLSTYRENE COPOLYMER, BUTA DIENE-1,3/CHLOROSTYRENE COPOLYMER, BUTADIENE-1,3/METHYL METHACRYLATE COPOLYMER, BUTADIENE-1,3/ACRYLAMIDE COPOLYMER, BUTADIENE-1,3/VINYL PYRIDINE COPOLYMER, BUTADIENE-1,3/ACRYLONITRILE COPOLYMER AND BUTADIENE-1,3/STYRENE COPOLYMER.
References Cited (Backward Citations)
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US2666042A
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US2837496A
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US2834747A
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |