Patent US3444102A successfully refreshed from Google Patents.
US3444102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of a high molecular weight polymer of an epoxide using a three component catalyst comprising an organozinc compound,an organomagnesium compound and water
Assignee: Sumitomo Seika Chemicals Co Ltd
•
Filing: 1964-09-11
•
Granted: 1969-05-13
•
Expires: 1984-09-11
Abstract
No abstract record available.
Inventors
- 👤 Teruhiko Ito
- 👤 Naoshi Mitsui
- 👤 Seiichiro Maeda
- 👤 Kiyoshi Sawata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:27
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2870100A
Cited
US3313741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |