US3221059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of olefin oxides with a metal phosphate-organometallic catalyst
Assignee: Sumitomo Chemical Co Ltd
•
Filing: 1962-05-22
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Granted: 1965-11-30
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Expires: 1982-05-22
Abstract
No abstract record available.
Inventors
- 👤 Fukui Kenichi
- 👤 Yuasa Sachio
- 👤 Kagiya Tsutomu
- 👤 Shimizu Takeo
- 👤 Sano Takezo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:51
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12; C08G65/26; C08G65/2642; C08G65/2645; C08G65/266; C08G65/269
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A METHOD FOR THE PRODUCTION OF OLEFIN OXIDE POLYMERS HAVING MOLECULAR WEIGHTS OF ABOUT 2,000 TO 10,000,000, WHICH COMPRISES POLYMERIZAING AN OLEFIN OXIDE HAVING THE FORMULA:
Claim 2
Independent Claim
26 words
A METHOD FOR THE PRODUCTION OF OLEFIN OXIDE POLYMERS HAVING MOLECULAR WEIGHTS OF ABOUT 2,000 TO 10,000,000, WHICH COMPRISES POLYMERIZAING AN OLEFIN OXIDE HAVING THE FORMULA:
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |