US3448171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High molecular weight urethane polymers having an ordered arrangement of pendant unsaturation and process for their production
Assignee: Wyandotte Chemicals Corp
•
Filing: 1966-09-06
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Granted: 1969-06-03
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Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Adolfas Damusis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/08; C08G18/10; C08G18/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2917486A
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US2879248A
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US2915493A
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US3008917A
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US3100759A
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GB955961A
Cited
US3297745A
Cited
US3288883A
Cited
US3304273A
Cited
US3368988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |