USRE28474F1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for rapidly dissolving water-soluble polymers
Assignee: ChampionX LLC
•
Filing: 1973-11-08
•
Granted: 1983-12-20
•
Expires: 1993-11-08
Abstract
No abstract record available.
Inventors
- 👤 Donald R Anderson
- 👤 Alvin J Frisque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:17
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C02; C02F; C02F1/00; C02F1/52; C02F1/5227; C02F1/54; C08L; C08L33/00; C08L33/24; C08L33/26; C08J2300/00; C08J2300/10
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |