US3281400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crosslinkage of polymers containing amide groups
Assignee: Cassella Farbwerke Mainkur AG
•
Filing: 1963-05-29
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Granted: 1966-10-25
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Expires: 1983-05-29
Abstract
No abstract record available.
Inventors
- 👤 Kunze Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:58
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56; C08F20/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2827397A
Cited
US3134810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |