Patent US3799006A successfully refreshed from Google Patents.
Patent US2540906A successfully refreshed from Google Patents.
US2540906A
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Artificial chamois skin and method of making the same
Assignee: Burgess Cellulose Co
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Filing: 1947-06-05
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Granted: 1951-02-06
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Expires: 1967-06-05
Abstract
No abstract record available.
Inventors
- 👤 George W Overton
- 👤 Binford E Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/63; C07D213/65; C07D213/66; B; B29; B29C; B29C44/00; B32; B32B; B32B27/00; C07D401/00; C07D401/02; C07D401/12; C07D471/00; C07D471/02; C07D471/04; Y; Y10; Y10S; Y10S424/00; Y10S424/07; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/249921; Y10T428/249953; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/164; Y10T442/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
THE METHOD OF MAKING A POROUS REGENERATED CELLULOSE SHEET WHICH COMPRISES PLACING A PLASTIC PASTE COMPOSED OF A MIXTURE COMPRISING VISCOSE, FIBERS AND PARTICLES OF A WATER SOLUBLE SALT UNDER PRESSURE BETWEEN TWO BROAD SURFACED MEMBERS SPACED APART APPROXIMATELY 1/16 INCH TO 1/2 INCH, REGENERATING CELLULOSE FROM SAID VOSCOSE, REMOVING THE RESULTING SHEET FROM BETWEEN SAID MEMBERS, WASHING SAID SHEET WITH WATER TO REMOVE SAID SALT PARTICLES AND FROM AN INTEGRAL POROUS REGENERATED CELLULOSE SHEET HAVING AT EACH OF THE BROAD SURFACES THEREOF A SKIN WHICH IS MORE DENSE THAN IS THE INTERIOR OF THE SHEET, AND DRYING SAID WASHED SHEET.
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) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |