Patent US2931792A successfully refreshed from Google Patents.
US2931792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrophoric catalytic systems
Assignee: Individual
•
Filing: 1956-02-02
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Granted: 1960-04-05
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Expires: 1976-02-02
Abstract
No abstract record available.
Inventors
- 👤 Robert S Aries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:52
CPC Classifications
C; C08; C08F; C08F10/00; C08F2410/00; C08F2410/01; C08F2410/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE PROCESS FOR THE POLYMERIZATION OF AN ALPHABETA ETHYLENICALLY UNSATURATED HYDROCARBON MONOMER SELECTED FROM THE GROUP CONSISTING OF THE GASEOUS OLEFINS AND STYRENE WHICH COMPRISES MAINTAINING SAID MONOMER IN CONTACT WITH A SUSPENSION IN AN INERT ORGANIC LIQUID OF A CATALYTICALLY ACTIVE SYSTEM CONSISTING ESSENTIALLY OF PARTICLES OF A PYROPHORIC MULTIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF THE METALS OF GROUPS IV, VI-B AND VIII OF THE PERIODIC SYSTEM HAVING A PARTICLE SIZE LESS THAN ABOUT 50 MICRONS, AND AS AN ACTIVATOR THEREFOR, AT LEAST 0.01 MOLE FOR EACH MOLE OF PYROPHORIC METAL, OF A METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF METAL HYDRIDES, METAL ALKYLS AND GRIGNARD REAGENTS, THE METAL IN SAID METAL COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF THE METALS OF GROUPS I-A, II AND III-A OF THE PERIODIC SYSTEM.
Claim 2
Dependent Claim
136 words
THE PROCESS FOR THE POLYMERIZATION OF AN ALPHABETA ETHYLENICALLY UNSATURATED HYDROCARBON MONOMER SELECTED FROM THE GROUP CONSISTING OF THE GASEOUS OLEFINS AND STYRENE WHICH COMPRISES MAINTAINING SAID MONOMER IN CONTACT WITH A SUSPENSION IN AN INERT ORGANIC LIQUID OF A CATALYTICALLY ACTIVE SYSTEM CONSISTING ESSENTIALLY OF PARTICLES OF A PYROPHORIC MULTIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF THE METALS OF GROUPS IV, VI-B AND VIII OF THE PERIODIC SYSTEM HAVING A PARTICLE SIZE LESS THAN ABOUT 50 MICRONS, AND AS AN ACTIVATOR THEREFOR, AT LEAST 0.01 MOLE FOR EACH MOLE OF PYROPHORIC METAL, OF A METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF METAL HYDRIDES, METAL ALKYLS AND GRIGNARD REAGENTS, THE METAL IN SAID METAL COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF THE METALS OF GROUPS I-A, II AND III-A OF THE PERIODIC SYSTEM.
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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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |