Patent US3047513A successfully refreshed from Google Patents.
US3047513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst
Assignee: EIDP Inc
•
Filing: 1955-09-07
•
Granted: 1962-07-31
•
Expires: 1975-09-07
Abstract
No abstract record available.
Inventors
- 👤 Gresham William Franklin
- 👤 Merckling Nicholas George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:58
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F10/00; C08F10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A POLYMERIZATION CATALYST COMPRISING THE PRODUCT FORMED BY ADMIXING A CHROMIUM COMPOUND, SELECTED FROM THE CLASS CONSISTING OF CHROMIUM TRICHLORIDE, CHROMYL CHLORIDE AND CHROMIUM ACETYLACETONATE, WITH AN ALKALI METAL ALUMINUM TETRAALKYL IN A MOLAR RATIO RANGING FROM 0.5 TO 5 IN INERT ORGANIC SOLVENT.
Claim 2
Dependent Claim
44 words
A POLYMERIZATION CATALYST COMPRISING THE PRODUCT FORMED BY ADMIXING A CHROMIUM COMPOUND, SELECTED FROM THE CLASS CONSISTING OF CHROMIUM TRICHLORIDE, CHROMYL CHLORIDE AND CHROMIUM ACETYLACETONATE, WITH AN ALKALI METAL ALUMINUM TETRAALKYL IN A MOLAR RATIO RANGING FROM 0.5 TO 5 IN INERT ORGANIC SOLVENT.
References Cited (Backward Citations)
US2396920A
Cited
US2388178A
Cited
US2439765A
Cited
US2600654A
Cited
US2781410A
Cited
BE533362A
Cited
US2824089A
Cited
US2850488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |