Patent US2169552A successfully refreshed from Google Patents.
Patent US3081282A successfully refreshed from Google Patents.
US3081282A
Expired / Lapsed
US
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Novel polymers and their preparation
Assignee: Polaroid Corp
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Filing: 1958-04-03
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Granted: 1963-03-12
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Expires: 1978-04-03
Abstract
No abstract record available.
Inventors
- 👤 Herman F Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:48
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/22; C08F18/02; C08F18/04; C08F18/08; C08F18/20; C08F20/00; C08F20/02; C08F20/42; C08F20/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS OF PREPARING SYNTHETIC LINEAR VINYL POLYMERS CONSISTING ESSENTIALLY OF RECURRING STRUCTURAL UNITS WHEREIN THE FUNCTIONAL SUBSTITUENTS ARE ATTACHED TO THE ADJACENT CARBON ATOMS IN THE POLYMER BACKBONE, SAID FUNCTIONAL SUBSTITUENTS BEING SELECTED FROM THE GROUP CONSISING OF -OH, HALOGEN, AND -C$N, SAID PROCESS COMPRISING POLYMERIZING, IN DILUTE SOLUTION AND WITH A FREE RADICAL INITIATING ADDITION POLYMERIZATION CATALYST, A DIVINYLOXALATE MONOMER WHOSE VINYL GROUPS ARE SEPARATED BY A
Claim 2
Dependent Claim
69 words
A PROCESS OF PREPARING SYNTHETIC LINEAR VINYL POLYMERS CONSISTING ESSENTIALLY OF RECURRING STRUCTURAL UNITS WHEREIN THE FUNCTIONAL SUBSTITUENTS ARE ATTACHED TO THE ADJACENT CARBON ATOMS IN THE POLYMER BACKBONE, SAID FUNCTIONAL SUBSTITUENTS BEING SELECTED FROM THE GROUP CONSISING OF -OH, HALOGEN, AND -C$N, SAID PROCESS COMPRISING POLYMERIZING, IN DILUTE SOLUTION AND WITH A FREE RADICAL INITIATING ADDITION POLYMERIZATION CATALYST, A DIVINYLOXALATE MONOMER WHOSE VINYL GROUPS ARE SEPARATED BY A
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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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |