Patent US3553285A successfully refreshed from Google Patents.
US3553285A
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US
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Vinylcopolymers with polyamide graft
Assignee: Bayer AG
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Filing: 1968-12-20
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Granted: 1971-01-05
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Expires: 1988-12-20
Abstract
Abstract VINYLCOPOLYMERS WITH A POLYAMIDE GRAFT PREPARED BY POLYCONDENSATION OF N-CARBARYLOXY-AMINOCARBOXYLIC ACIDS IN THE PRESENCE OF COPOLYMERS OF VINYL-MONOMERS WHICH CONTAIN MASKED ISOCYANATE GROUPS WITH EVOLUTION OF THE MASKING AGENT AND CARBON DIOXIDE.
Inventors
- 👤 Hugo Vernaleken
- 👤 Georg Malamet
- 👤 Ludwig Bottenbruch
- 👤 Heinrich Krimm
- 👤 Hermann Schnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:15
CPC Classifications
C; C08; C08G; C08G69/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |