US2989506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic polymerization
Assignee: Celanese Corp
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Filing: 1957-10-21
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Granted: 1961-06-20
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Expires: 1977-10-21
Abstract
No abstract record available.
Inventors
- 👤 Donald E Hudgin
- 👤 Frank M Berardinelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:45
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR PREPARING TOUGH, HIGH MOLECULAR WEIGHT MATERIAL WHICH COMPRISES POLYMERIZING TRIOXANE IN UNDILUTED STATE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN A POLYMERIZATION ZONE WHEREIN IT IS IN ADMIXTURE WITH A SMALL CATALYTIC AMOUNT OF A COORDINATE COMPLEX OF BORON FLUORIDE WITH AN ORGANIC COMPOUND IN WHICH AN ELEMENT OF THE GROUP CONSISTING OF OXYGEN AND SULFUR IS THE DONOR ATOM, SAID COORDINATE COMPLEX BEING INTRODUCED AS SUCH INTO THE POLYMERIZATION ZONE.
Claim 2
Dependent Claim
72 words
A PROCESS FOR PREPARING TOUGH, HIGH MOLECULAR WEIGHT MATERIAL WHICH COMPRISES POLYMERIZING TRIOXANE IN UNDILUTED STATE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS IN A POLYMERIZATION ZONE WHEREIN IT IS IN ADMIXTURE WITH A SMALL CATALYTIC AMOUNT OF A COORDINATE COMPLEX OF BORON FLUORIDE WITH AN ORGANIC COMPOUND IN WHICH AN ELEMENT OF THE GROUP CONSISTING OF OXYGEN AND SULFUR IS THE DONOR ATOM, SAID COORDINATE COMPLEX BEING INTRODUCED AS SUCH INTO THE POLYMERIZATION ZONE.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |