US3759826A
Expired / Lapsed
US
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Fractionation by gel permeation
Assignee: Georgia-Pacific LLC
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Filing: 1971-08-23
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Granted: 1973-09-18
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Expires: 1991-08-23
Abstract
Abstract A PROCESS FOR THE FRACTIONATION AND RECOVERY OF WATERSOLUBLE COMPOUNDS BY GEL PERMEATION USING A WATER-INSOLUBLE, POLYMERIZED LIGNOSULFONATE RESIN.
Inventors
- 👤 V Felicetta
- 👤 E King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:55
CPC Classifications
A; A23; A23C; A23C9/00; A23C9/14; A23C9/148; B; B01; B01J; B01J47/00; B01J47/014; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/832; Y10S530/833; Y10S530/859; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |