US3726850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignin dispersing agent
Assignee: REED LIGNIN Inc 100 HWY 51 SOUTH ROTHSCHILD WI 54474-1198 A CORP OF
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Filing: 1971-07-29
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Granted: 1973-04-10
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Expires: 1991-07-29
Abstract
Abstract A WATER-, ALKALI- AND ACID-SOLUBLE, OXIDIZED LIGNIN DISPERSING AGENT, SUBSTANTIALLY FREE OF ORGANICALLY BOUND SULFUR, FORMED BY THE REACTION OF OZONE ON LIGNIN OBTAINED FROM THE SPENT LIQUORS OF THE ALKALINE PULPING OF WOOD.
Inventors
- 👤 W Detroit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:09
CPC Classifications
C; C08; C08H; C08H6/00; Y; Y10; Y10S; Y10S264/00; Y10S264/43; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |