Patent US2955994A successfully refreshed from Google Patents.
US2955994A
Expired / Lapsed
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Radiochemical preparation of ion-exchange resins and soil conditioners
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-12-16
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Granted: 1960-10-11
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Expires: 1974-12-16
Abstract
No abstract record available.
Inventors
- 👤 Donald A Guthrie
- 👤 Robert M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:04
CPC Classifications
C; C08; C08F; C08F222/00; C08F222/04; C08F222/06; B; B01; B01J; B01J19/00; B01J19/08; B01J19/081; C08F2/00; C08F2/46; C08F22/00; C08F22/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A COPOLYMERIZATION PROCESS WHICH COMPRISES EXPOSING A MIXTURE OF MALEIC ANHYDRIDE AND AN OLEFINIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF A NON-CONJUGATED DIOLEFIN AND A MIXTURE OF A NON-CONJUGATED DIOLEFIN AND A MONO-OLEFIN AT A TEMPERATURE IN THE RANGE OF 0* TO 300* TO HIGH ENERGY IONIZING RADIATION HAVING AN INTENSITY IN THE RANGE OF ABOUT 100,000 TO 5,000,000 R./HR. FOR A PERIOD OF TIME IN THE RANGE OF ABOUT 0.5 TO 24 HOURS, THE MOLE RATIO OF SAID MALEIC ANHYDRIDE TO SAID OLEFINIC MATERIAL BEING IN THE RANGE OF 1/5 TO 5/1.
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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |