Patent GB607690A successfully refreshed from Google Patents.
DE1720709C3
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for the continuous production of polyvinyl alcohol
Assignee: Hoechst AG
•
Filing: 1967-09-09
•
Granted: 1977-06-16
•
Expires: 1987-09-09
Abstract
No abstract record available.
Inventors
- 👤 Helmut DipL-Ing. 6209 Fischbach; Solbach Peter 6231 Niederhofheim; Müller Wilhelm Dr. 6230 Frankfurt; Seibel Peter Dr. 6241 Ruppertshain; Eilers Hajo Dr. 6239 Hofheim Gerstenberg (verstorben)
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
—
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.