US3437641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the acid dye receptivity of polylactams and polylactam products so produced
Assignee: Glanzstoff AG
•
Filing: 1966-02-28
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Granted: 1969-04-08
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Expires: 1986-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jurgen Lenz
- 👤 Ernst Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08G; C08G69/00; C08G69/02; C08K5/16; C08K5/17; C08K5/53; C08K5/5317; C08K5/5333
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2241322A
Cited
US2557808A
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US2510777A
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US2904536A
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US3296216A
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US3300448A
Cited
US3296215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |