US3459714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of polyamides in finely grained form
Assignee: Chemische Werke Witten GmbH
•
Filing: 1965-07-09
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Granted: 1969-08-05
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Expires: 1985-07-09
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang Wolfes
- 👤 Gustav Renckhoff
- 👤 Hans-Leo Huelsmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:23
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/28; C08G69/30; C08J3/14; C08J2377/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3379695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |