US3634183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compacted regenerated cellulose sponges and method of preparing the same
Assignee: Richardson Vicks Inc
•
Filing: 1970-05-15
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Granted: 1972-01-11
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Expires: 1990-05-15
Abstract
Abstract Stacks of individual thinly sliced sheets of regenerated cellulose may be compressed at pressures of 2,000-20,000 pounds per square inch to reduce the thickness thereof to 8-20 percent of the original stacked height to obtain a product which remains compressed and in which the individual thin sheets of regenerated cellulose adhere to each other so long as they are dry. The compressed sheets can be cut into desired shapes, packed in shipping boxes, transported and handled on automatic filling machines without falling apart. The individual units are useful in preparing cosmetic pads for cleaning, disinfecting and otherwise applying liquid medicaments to the skin.
Inventors
- 👤 Leonard J Viola
- 👤 Eugene H Gans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
B; B29; B29C; B29C44/00; A; A61; A61K; A61K8/00; A61K8/02; A61K8/0208; A61Q; A61Q15/00; Y; Y10; Y10S; Y10S206/00; Y10S206/823; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
32 words
An article of manufacture in accordance with claim 1 in which the individual slices of regenerated cellulose have a compressed thickness of 8 to 20 percent of 1/64 inch to 1/4 inch.
Claim 2
Dependent Claim
24 words
An article of manufacture in accordance with claim 2 in which the compressed slices have an area of between 1 and 4 square inches.
Claim 3
Dependent Claim
26 words
An article of manufacture in accordance with claim 3 in which the compressed cellulose sponge unit comprises five to 50 individual thin slices of regenerated cellulose.
Claim 4
Dependent Claim
66 words
A method of preparing the article of manufacture of claim 1 which comprises subjecting stacks of 10 to 50 sheets of regenerated cellulose sponge material, each sheet having a dry thickness of 1/64 inch to 1/4 inch to a pressure within the range of 2,000 to 20,000 pounds per square inch whereby the sheets are compressed to within 8 to 20 percent of their original thickness.
Claim 5
Dependent Claim
25 words
A method in accordance with claim 5 in which the compressed sheets are cut into units having an area of 1 to 4 square inches.
References Cited (Backward Citations)
US2133805A
Cited
US2744292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |