US2935542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propylene polymers oils
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1958-09-09
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Granted: 1960-05-03
•
Expires: 1978-09-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Leon Sherwood Minckler
- 👤 Herbert F Strohmayer
- 👤 Eugene L Stogryn
- 👤 Perry A Argabright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:55
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR PREPARING LOW MOLECULAR WEIGHT OILS HAVING ABOUT ONE DOUBLE BOND PER MOLECULE, SAID DOUBLE BOND BEING PREDOMINANTLY IN THE TERMINAL FORM WHICH COMPRISES POLYMERIZING PROPYLENE WITH A CATALYST SYSTEM CONSISTING OF A FRIEDEL-CRAFTS COMPOUND, SELECTED FROM THE GROUP CONSISTING OF STANNIC CHLORIDE AND MERCURIC CHLORIDE, AND AN ALUMINUM ALKYL COMPOUND, THE MOLAR RATIO OF FRIEDEL-CRAFTS COMPOUND TO ALUMINUM ALKYL BEING A MINIMUM OF ONE.
Claim 2
Dependent Claim
67 words
A PROCESS FOR PREPARING LOW MOLECULAR WEIGHT OILS HAVING ABOUT ONE DOUBLE BOND PER MOLECULE, SAID DOUBLE BOND BEING PREDOMINANTLY IN THE TERMINAL FORM WHICH COMPRISES POLYMERIZING PROPYLENE WITH A CATALYST SYSTEM CONSISTING OF A FRIEDEL-CRAFTS COMPOUND, SELECTED FROM THE GROUP CONSISTING OF STANNIC CHLORIDE AND MERCURIC CHLORIDE, AND AN ALUMINUM ALKYL COMPOUND, THE MOLAR RATIO OF FRIEDEL-CRAFTS COMPOUND TO ALUMINUM ALKYL BEING A MINIMUM OF ONE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |