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Patent US3417052A successfully refreshed from Google Patents.
US3417052A
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US
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Polyethers and process for their manufacture
Assignee: Hoechst AG
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Filing: 1967-01-03
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Granted: 1968-12-17
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Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Messwarb Gunter
- 👤 Luders Walter
- 👤 Munder Johannes
- 👤 Steppan Hartmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:47
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/223
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
COPOLYMERS FROM (A) COMPOUNDS OF FORMULA I
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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |