CA864433A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
N-sulfohydrocarbon-substituted acrylamide polymers as viscosity increasing agents for secondary oil recovery
Assignee: Lubrizol Corp
•
Filing: —
•
Granted: 1971-02-23
•
Expires: 1988-02-23
Abstract
No abstract record available.
Inventors
- 👤 R. Kaufman Paul
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-23 17:06
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.