US3235626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of controlled branch configuration
Assignee: Dow Chemical Co
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Filing: 1961-03-31
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Granted: 1966-02-15
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 Waack Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:19
CPC Classifications
C; C08; C08F; C08F290/00; C08F290/02; C08F290/04; C08F290/044; C08F30/00; C08F30/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE METHOD OF FORMING A POLYMER OF CONTROLLED BRANCH CONFIGURATION WHICH COMPRISES FORMING A PREPOLYMER BY REACTING A VINYL METAL COMPOUND HAVING THE FORMULA VIM SELECTED FROM THE GROUP CONSISTING OF VINYL LITHIUM, VINYUL SODIUM, VINYL POTASSIUM, LOWER ALKYL SUBSTITUTED VINYL AND PHENYL COUNTERPARTS THEREOF, ALLYL LITHIUM, ALLYL SODIUM, AND ALLYL POTASSIUM, WITH A MONOOLEFINIC MONOMER AND A POLYMERIZATION CATALYST, THEREBY TO FORM A POLYMER CORRESPONDING TO THE FOLLOWING:
Claim 2
Independent Claim
69 words
THE METHOD OF FORMING A POLYMER OF CONTROLLED BRANCH CONFIGURATION WHICH COMPRISES FORMING A PREPOLYMER BY REACTING A VINYL METAL COMPOUND HAVING THE FORMULA VIM SELECTED FROM THE GROUP CONSISTING OF VINYL LITHIUM, VINYUL SODIUM, VINYL POTASSIUM, LOWER ALKYL SUBSTITUTED VINYL AND PHENYL COUNTERPARTS THEREOF, ALLYL LITHIUM, ALLYL SODIUM, AND ALLYL POTASSIUM, WITH A MONOOLEFINIC MONOMER AND A POLYMERIZATION CATALYST, THEREBY TO FORM A POLYMER CORRESPONDING TO THE FOLLOWING:
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |