US2749318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High molecular weight solid polymethylene and method for preparing the same
Assignee: General Electric Co
•
Filing: 1953-03-20
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Granted: 1956-06-05
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Expires: 1973-03-20
Abstract
No abstract record available.
Inventors
- 👤 Robert C Osthoff
- 👤 Simon W Kantor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:50
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; Y; Y10; Y10S; Y10S220/00; Y10S220/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE PROCESS FOR PREPARING SOLID POLYMETHYLENE HAVING A MOLECULAR WEIGHT ABOVE 500,000 AS DETERMINED BY THE HARRIS EQUATION WHICH COMPRISES CONTACTING AT ABOUT -15* C. TO 5* C. AN ETHER SOLUTION OF ABOUT 1-20% DIAZOMETHANE, BASED ON WEIGHT OF TOTAL SOLUTION, WITH ABOUT 0.01-0.1% OF AN ETHERATE OF BORON TRIFLUORIDE, BASED ON WEIGHT OF DIAZOMETHANE.
Claim 2
Dependent Claim
55 words
THE PROCESS FOR PREPARING SOLID POLYMETHYLENE HAVING A MOLECULAR WEIGHT ABOVE 500,000 AS DETERMINED BY THE HARRIS EQUATION WHICH COMPRISES CONTACTING AT ABOUT -15* C. TO 5* C. AN ETHER SOLUTION OF ABOUT 1-20% DIAZOMETHANE, BASED ON WEIGHT OF TOTAL SOLUTION, WITH ABOUT 0.01-0.1% OF AN ETHERATE OF BORON TRIFLUORIDE, BASED ON WEIGHT OF DIAZOMETHANE.
References Cited (Backward Citations)
US2670333A
Cited
US2652372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |