US2939846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polymerization catalyst
Assignee: Shell USA Inc
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Filing: 1956-05-25
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Granted: 1960-06-07
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Expires: 1976-05-25
Abstract
No abstract record available.
Inventors
- 👤 Gordon Morris
- 👤 Wright Bernard
- 👤 Edward T Borrows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:19
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR PRODUCING A POLYMERIZATION CATALYST WHICH COMPRISES ENTRAINING IN AN INERT GAS STREAM VAPOR OF A REDUCING ORGANOMETALLIC COMPOUND OF A METAL OF THE CLASS CONSISTING OF ALUMINUM, MAGNESIUM, ZINC, AND ALKALI METALS, ENTRAINING IN A SEPARATE INERT GAS STREAM VAPOR OF A SALT OF A METAL OF SUB-GROUP A OF GROUPS IV TO VI OF THE PERIODIC TABLE, WHICH SALT HAS THE METAL IN A HIGHER STATE OF VALENCY THAN ITS LOWEST POSITIVE VALENCY, INTERMIXING THE TWO GAS STREAMS AT A TEMPERATURE AT WHICH SAID CATALYST COMPONENTS ARE VAPORIZABLE AND NOT ABOVE ABOUT 100* C., AND DEPOSITING THE RESULTING POLYMERIZATION CATALYST ON A SOLID SURFACE.
Claim 2
Dependent Claim
108 words
A PROCESS FOR PRODUCING A POLYMERIZATION CATALYST WHICH COMPRISES ENTRAINING IN AN INERT GAS STREAM VAPOR OF A REDUCING ORGANOMETALLIC COMPOUND OF A METAL OF THE CLASS CONSISTING OF ALUMINUM, MAGNESIUM, ZINC, AND ALKALI METALS, ENTRAINING IN A SEPARATE INERT GAS STREAM VAPOR OF A SALT OF A METAL OF SUB-GROUP A OF GROUPS IV TO VI OF THE PERIODIC TABLE, WHICH SALT HAS THE METAL IN A HIGHER STATE OF VALENCY THAN ITS LOWEST POSITIVE VALENCY, INTERMIXING THE TWO GAS STREAMS AT A TEMPERATURE AT WHICH SAID CATALYST COMPONENTS ARE VAPORIZABLE AND NOT ABOVE ABOUT 100* C., AND DEPOSITING THE RESULTING POLYMERIZATION CATALYST ON A SOLID SURFACE.
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |