US2685575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process and catalyst
Assignee: Hexion Inc
•
Filing: 1951-01-22
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Granted: 1954-08-03
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Expires: 1971-01-22
Abstract
No abstract record available.
Inventors
- 👤 Randall G Heiligmann
- 👤 Benington Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:03
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/14; C08F10/00; C08F10/02; C08F112/00; C08F112/02; C08F112/04; C08F112/06; C08F112/08; C08F112/12; C08F236/00; C08F236/02; C08F236/04; C08F236/10; C08F110/00; C08F110/02; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F236/06; Y; Y10; Y10S; Y10S260/00; Y10S260/25; Y10S526/00; Y10S526/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
IN A POLYMERIZATION PROCESS FOR ETHYLENIC UNSATURATES AT SUBSTANTIALLY ELEVATED PRESSURE, A POLYMERIZATION CATALYST COMPRISING A HYDRIDE OF BORON.
Claim 2
Dependent Claim
19 words
IN A POLYMERIZATION PROCESS FOR ETHYLENIC UNSATURATES AT SUBSTANTIALLY ELEVATED PRESSURE, A POLYMERIZATION CATALYST COMPRISING A HYDRIDE OF BORON.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |