US3726709A
Expired / Lapsed
US
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Method for the manufacture of cellulose-containing material with improved abrasion resistance
Assignee: Lonza AG
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Filing: 1970-06-02
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Granted: 1973-04-10
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Expires: 1990-06-02
Abstract
Abstract METHOD OF IMPROVING ABRASION RESISTANCE AND RESISTANCE TO WATER ABSORPTION OF WOOD AND OTHER CELLULOSE CONTAINING MATERIALS IN WHICH THE WOOD IS IMPREGNATED WITH A POLYMERIZABLE MIXTURE CONTAINING VINYL ACETATE OR PROPIONATE TOGETHER WITH A HIGHLY BRANCHED MONOMER OF A VINYL ESTER OF A CARBOXYLIC ACID CONTAINING SEVEN TO THIRTEEN CARBON ATOMS AND THE MIXTURE POLYMERIZED.
Inventors
- 👤 J Heetman
- 👤 P Garth
- 👤 J Hoigne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:32
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/18; D21H17/19; B; B27; B27K; B27K3/00; B27K3/02; B27K3/15; C; C08; C08L; C08L97/00; C08L97/02; B27K2240/00; B27K2240/70; B27K5/00; B27K5/003; C08K; C08K5/00; C08K5/01; C08K5/16; C08K5/20; C08L35/00; C08L35/02; C08L67/00; D21H21/00; D21H21/14; D21H21/28; D21H23/00; D21H23/02; D21H23/22; D21H23/30; Y; Y10; Y10T; Y10T428/00; Y10T428/4935; Y10T428/662
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) | 1976-04-09 | 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 |