US2991157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalysts
Assignee: Cabot Corp
•
Filing: 1958-12-31
•
Granted: 1961-07-04
•
Expires: 1978-12-31
Abstract
No abstract record available.
Inventors
- 👤 Orzechowski Adam
- 👤 James C Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:04
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR DETERMING THE CONCENTRATION OF FREE METAL ALKYL PRESENT IN A HYDROCARBON MEDIUM WHICH COMPRISES COLORIMETRICALLY TITRATING A STANDARD SOLUTION OF ISOPROPANOL WITH SAID ALKYL CONTAINING MEDIUM IN THE PRESENCE OF AN INDICATOR COMPRISING A METAL ALKYL-REDUCIBLE HALIDE OF A METAL CHOSEN FROM THE GROP CONSISTING OF THE GROUP IVA, VA AND VIA METALS.
Claim 2
Dependent Claim
56 words
A PROCESS FOR DETERMING THE CONCENTRATION OF FREE METAL ALKYL PRESENT IN A HYDROCARBON MEDIUM WHICH COMPRISES COLORIMETRICALLY TITRATING A STANDARD SOLUTION OF ISOPROPANOL WITH SAID ALKYL CONTAINING MEDIUM IN THE PRESENCE OF AN INDICATOR COMPRISING A METAL ALKYL-REDUCIBLE HALIDE OF A METAL CHOSEN FROM THE GROP CONSISTING OF THE GROUP IVA, VA AND VIA METALS.
References Cited (Backward Citations)
US2133452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |