US3062801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propylene catalyst
Assignee: WR Grace and Co
•
Filing: 1960-06-01
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Granted: 1962-11-06
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Expires: 1980-06-01
Abstract
No abstract record available.
Inventors
- 👤 Donald F Hoeg
- 👤 Calvin J Benning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:42
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; Y; Y10; Y10S; Y10S526/00; Y10S526/903; Y10S526/906; Y10S526/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
THE METHOD OF FORMING A CATALYST TO MAKE HIGH MOLECULAR WEIGHT POLYPROPYLENE THAT COMPRISES GRINDING AS THE SOLE MATERIAL BEING GROUND A MEMBER OF THE GROUP CONSISTING OF TICL2 AND TICL3 IN A GASEOUS PROPYLENE ATMOSPHERE FOR AT LEAST ONE HOUR AT AN AMBIENT TEMPERATURE AND A PROPYLENE PRESSURE RANGING FROM ATMOSPHERIC TO 125 P.S.I. AND COMBINING THE THUS GROUND PRODUCT WITH TRIISOBUTYL ALUMINUM.
Claim 2
Independent Claim
64 words
THE METHOD OF FORMING A CATALYST TO MAKE HIGH MOLECULAR WEIGHT POLYPROPYLENE THAT COMPRISES GRINDING AS THE SOLE MATERIAL BEING GROUND A MEMBER OF THE GROUP CONSISTING OF TICL2 AND TICL3 IN A GASEOUS PROPYLENE ATMOSPHERE FOR AT LEAST ONE HOUR AT AN AMBIENT TEMPERATURE AND A PROPYLENE PRESSURE RANGING FROM ATMOSPHERIC TO 125 P.S.I. AND COMBINING THE THUS GROUND PRODUCT WITH TRIISOBUTYL ALUMINUM.
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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |