US3404119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides containing a pigment and a basic product obtained from a condensate of napthalene sulphonic acid and formaldehyde
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1966-01-17
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Granted: 1968-10-01
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Expires: 1986-01-17
Abstract
No abstract record available.
Inventors
- 👤 Harper Harold Roy
- 👤 Mather Leslie Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/0088; C08; C08G; C08G85/00; C08L; C08L77/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |