Patent US3168456A successfully refreshed from Google Patents.
US3168456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric carboxylic acids by irradiation
Assignee: Phillips Petroleum Co
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Filing: 1960-12-06
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Granted: 1965-02-02
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Expires: 1980-12-06
Abstract
No abstract record available.
Inventors
- 👤 Furrow Clarence Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:55
CPC Classifications
C; C07; C07C; C07C327/00; C07C51/00; C07C51/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR PRODUCING A POLYMERIC CARBOXYLIC ACID WHICH COMPRISIES SUBJECTING A 1-OLEFIN HAVING FROM 2-8 CARBON ATOMS AND AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE AND CARBON DISULFIDE TO THE ACTION OF IONIZING RADIATION AT A DOSE RATE IN THE RANGE 10**3-10**11 REP. UNITS PER HOUR UP TO A TOTAL DOSAGE IN THE RANGE 10**5-10**11 ROENTGENS AND AT A TEMPERATURE IN THE APPROXIMATE RANGE -60 TO 100*C., THE WEIGHT RATIO OF SAID SELECTED MATERIAL TO OLEFIN BEING IN THE RANGE 1:1-100:1 AND THE PRESSURE BEING SUFFICIENT TO MAINTAIN AT LEAST A PORTION OF SAID SELECTED MATERIAL IN LIQUID PHASE.
Claim 2
Dependent Claim
105 words
A PROCESS FOR PRODUCING A POLYMERIC CARBOXYLIC ACID WHICH COMPRISIES SUBJECTING A 1-OLEFIN HAVING FROM 2-8 CARBON ATOMS AND AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE AND CARBON DISULFIDE TO THE ACTION OF IONIZING RADIATION AT A DOSE RATE IN THE RANGE 10**3-10**11 REP. UNITS PER HOUR UP TO A TOTAL DOSAGE IN THE RANGE 10**5-10**11 ROENTGENS AND AT A TEMPERATURE IN THE APPROXIMATE RANGE -60 TO 100*C., THE WEIGHT RATIO OF SAID SELECTED MATERIAL TO OLEFIN BEING IN THE RANGE 1:1-100:1 AND THE PRESSURE BEING SUFFICIENT TO MAINTAIN AT LEAST A PORTION OF SAID SELECTED MATERIAL IN LIQUID PHASE.
References Cited (Backward Citations)
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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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |