US3409593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethers and process for their manufacture
Assignee: Hoechst AG
•
Filing: 1967-01-03
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Granted: 1968-11-05
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Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Messwarb Gunter
- 👤 Neuisenburg Walter Luders
- 👤 Munder Johannes
- 👤 Steppan Hartmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:55
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/06; C08G65/08; C08G65/10; C08G65/12; C08G65/22; C08G65/223; C08G65/26; C08G65/2642; C08G65/2645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3135705A
Cited
US3200086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |