Patent US2760943A successfully refreshed from Google Patents.
US2760943A
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Elastic lignin compositions
Assignee: Zellsloff Fabrik Waldhof AG
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Filing: 1952-02-15
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Granted: 1956-08-28
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Expires: 1972-02-15
Abstract
No abstract record available.
Inventors
- 👤 Sohn August Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:26
CPC Classifications
C; C08; C08L; C08L7/00; C08L21/00; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K3/26; C08K3/34; C08L97/00; C08L97/005; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A NORMALLY SOLID LIGNIN COMPOSITION COMPRISING A LIGNIN COMPONENT CONTAINING LESS THAN 1% FREE CALCIUM AS CALCIUM OXIDE, OBTAINED BY EVAPORATING TO DRYNESS WASTE NEUTRALIZED SULFITE LIQUOR, FREED FROM CALCIUM OXIDE, AND BY REDISPERSING IN, FROM 10% TO 30% BY WEIGHT, A LIQUID SELECTED FROM THE GROUP CONSISTING OF WATER, LOWER ALIPHATIC ALCOHOLS, AND AQUEOUS LOWER ALIPHATIC ALCOHOLS, SAID LIGNIN COMPOSITION BEING DOUGHLY AT 40* -80* C. AND SOLID AT 20* C. AND ADAPTED TO DISPERSE UP TO 100% BY WEIGHT OF A RUBBER COMPONENT SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, BUTADIENEACRYLONITRILE POLYMER, BUTADIENE-STYRENE POLYMER, BUTADIENE-ISOBUTYLENE POLYMER AND CHLORO BUTADIENE POLYMER.
Claim 2
Dependent Claim
103 words
A NORMALLY SOLID LIGNIN COMPOSITION COMPRISING A LIGNIN COMPONENT CONTAINING LESS THAN 1% FREE CALCIUM AS CALCIUM OXIDE, OBTAINED BY EVAPORATING TO DRYNESS WASTE NEUTRALIZED SULFITE LIQUOR, FREED FROM CALCIUM OXIDE, AND BY REDISPERSING IN, FROM 10% TO 30% BY WEIGHT, A LIQUID SELECTED FROM THE GROUP CONSISTING OF WATER, LOWER ALIPHATIC ALCOHOLS, AND AQUEOUS LOWER ALIPHATIC ALCOHOLS, SAID LIGNIN COMPOSITION BEING DOUGHLY AT 40* -80* C. AND SOLID AT 20* C. AND ADAPTED TO DISPERSE UP TO 100% BY WEIGHT OF A RUBBER COMPONENT SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, BUTADIENEACRYLONITRILE POLYMER, BUTADIENE-STYRENE POLYMER, BUTADIENE-ISOBUTYLENE POLYMER AND CHLORO BUTADIENE POLYMER.
References Cited (Backward Citations)
US2077884A
Cited
US2161749A
Cited
US2266265A
Cited
US2387619A
Cited
US2365599A
Cited
US2377709A
Cited
US2443889A
Cited
US2491832A
Cited
US2542344A
Cited
US2533632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |