US2760943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic lignin compositions
Assignee: Zellsloff Fabrik Waldhof AG
•
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 00:15
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.
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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) | 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 |