US3365526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyurethane spinning solution and fibers using aromatic dihydroxy alkyl ethers
Assignee: Bayer AG
•
Filing: 1964-02-19
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Granted: 1968-01-23
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Expires: 1984-02-19
Abstract
No abstract record available.
Inventors
- 👤 Wieden Horst
- 👤 Muller Erwin
- 👤 Nischk Guntber
- 👤 Rellensmann Wolfgang
- 👤 Falkai Bela Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2755266A
Cited
US2861972A
Cited
US2929804A
Cited
GB798209A
Cited
US3164439A
Cited
US3016364A
Cited
US3001971A
Cited
US3078257A
Cited
US3012992A
Cited
US3214411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |