US3445525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyethers
Assignee: Bayer AG
•
Filing: 1964-04-15
•
Granted: 1969-05-20
•
Expires: 1984-04-15
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Bormann
- 👤 Herbert Nordt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:58
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08G65/2642; C08G65/2645; C08G65/2648; C08G65/2696
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1910331A
Cited
US2271873A
Cited
US2233381A
Cited
US2499367A
Cited
US2782240A
Cited
US2870220A
Cited
US3048548A
Cited
US3190927A
Cited
US3075928A
Cited
US3291845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |