US3328362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of modified polymers
Assignee: Celanese Corp
•
Filing: 1964-01-30
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Granted: 1967-06-27
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Expires: 1984-01-30
Abstract
No abstract record available.
Inventors
- 👤 William J Roberts
- 👤 Pietro Joseph Di
- 👤 Charles L Smart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:10
CPC Classifications
C; C08; C08F; C08F8/00; C08F2/00; C08F2/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE METHOD OF INTRODUCING POLAR GROUPS INTO AN ORGANIC POLYMER CONTAINING 0.1 TO 3.5 RESIDUAL, REACTIVE, DOUBLE BONDS PER 100 CARBON ATOMS, SAID METHOD COMPRISING REACTING THE SAID POLYMER IN THE PRESENCE OF A FREERADICAL INITIATOR WITH GROUPS EXCESS OVER STOICHIOMETRICAL PROPORTIONS OF A CHAIN-TRANSFER AGENT THAT CONTAINS FROM 3 TO 500 MOLES PER MOLE OF ETHYLENICALLY UNSATURATED SITE IN SAID POLYMER OF A POLAR COMPOUND SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED ALKANOIC ACIDS CONTAINING 1 TO 6 CARBON ATOMS, ANHYDRIDES OF SAID ACIDS AND ALKANSULFONIC ACIDS AND SALTS CONTAINING 1 TO 5 CARBON ATOMS UNTIL THE DESIRED DEGREE OF SATURATION OF THE SAID DOUBLE BONDS IN THE SAID POLYMER BY THE SAID POLAR GROUPS HAS BEEN EFFECTED.
Claim 2
Independent Claim
119 words
THE METHOD OF INTRODUCING POLAR GROUPS INTO AN ORGANIC POLYMER CONTAINING 0.1 TO 3.5 RESIDUAL, REACTIVE, DOUBLE BONDS PER 100 CARBON ATOMS, SAID METHOD COMPRISING REACTING THE SAID POLYMER IN THE PRESENCE OF A FREERADICAL INITIATOR WITH GROUPS EXCESS OVER STOICHIOMETRICAL PROPORTIONS OF A CHAIN-TRANSFER AGENT THAT CONTAINS FROM 3 TO 500 MOLES PER MOLE OF ETHYLENICALLY UNSATURATED SITE IN SAID POLYMER OF A POLAR COMPOUND SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED ALKANOIC ACIDS CONTAINING 1 TO 6 CARBON ATOMS, ANHYDRIDES OF SAID ACIDS AND ALKANSULFONIC ACIDS AND SALTS CONTAINING 1 TO 5 CARBON ATOMS UNTIL THE DESIRED DEGREE OF SATURATION OF THE SAID DOUBLE BONDS IN THE SAID POLYMER BY THE SAID POLAR GROUPS HAS BEEN EFFECTED.
References Cited (Backward Citations)
US2811514A
Cited
US2964515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |