US3825624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble sizing agent
Assignee: Eneos Corp
•
Filing: 1972-01-21
•
Granted: 1974-07-23
•
Expires: 1992-01-21
Abstract
Abstract A WATER-SOLUBLE SIZING AGENT OBTAINED BY REACTING THE RESIN WITH UNSATURATED CARBOXYLIC ACID; AND SAID RESIN BEING PREPARED BY POLYMERIZING HYDROCARBON MIXTURE OF A THERMALLY CRACKED PETROLEUM OIL FRACTION HAVING AN UNSATURATED AROMATIC HYDROCARBON CONTENT IN THE RANGE OF 15 TO 80% BY WEIGHT AND CONJUGATED DIOLEFIN CONTENT IN THE RANGE OF 20 TO 85% BY WEIGHT IN THE PRESENCE OF BORON TRIFLUORIDE CATALYST.
Inventors
- 👤 K Hirai
- 👤 H Hayashi
- 👤 Y Hiratsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:42
CPC Classifications
C; C08; C08F; C08F240/00; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; D21H17/62
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
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |