US4459987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible abrasive pad
Assignee: Individual
•
Filing: 1982-03-10
•
Granted: 1984-07-17
•
Expires: 2002-03-10
Abstract
Abstract A flexible cosmetic abrasive sheet comprises (a) a tough, flexible sheet of silicone polymer, (b) abrasive particulate carried by and protruding from at least one side of the sheet and exposed for rubbing contact with human skin during use of the sheet. A layer of reticulated, resiliently compressible foam may be attached to the abrasive sheet, for light dermabrasion.
Inventors
- 👤 William E. Pangburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:20
CPC Classifications
B; B24; B24D; B24D15/00; B24D15/04; A; A61; A61B; A61B17/00; A61B17/54
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
80 words
A flexible cosmetic abrasive sheet comprising (a) a tough, flexible sheet of silicone polymer, (b) abrasive particulate carried by and protruding from at least one side of the sheet and exposed for rubbing contact with human skin or other work during use of the sheet, (c) said sheet being stretchable, and being formed from a layer of initially incompletely cured silicone polymer with which said particulate has been combined to adhere to the sheet, the sheet then allowed to cure.
Claim 2
Dependent Claim
80 words
A flexible cosmetic abrasive sheet comprising (a) a tough, flexible sheet of silicone polymer, (b) abrasive particulate carried by and protruding from at least one side of the sheet and exposed for rubbing contact with human skin or other work during use of the sheet, (c) said sheet being stretchable, and being formed from a layer of initially incompletely cured silicone polymer with which said particulate has been combined to adhere to the sheet, the sheet then allowed to cure.
Claim 3
Dependent Claim
9 words
The sheet of claim 1 which has pad configuration.
Claim 4
Dependent Claim
51 words
The sheet of claim 2 which includes a second sheet as defined in (a) of claim 1 and abrasive particulate carried by and protruding from at least one side of the second sheet, the two sheets being bonded together so that the abrasive is exposed at opposite sides of the pad.
Claim 5
Dependent Claim
12 words
The pad of claim 3 wherein said abrasive particulate consists of pumice.
Claim 6
Dependent Claim
21 words
The sheet of claim 3 wherein said two sheets are spaced apart, and including a bonding layer sandwiched between said sheets.
Claim 7
Dependent Claim
13 words
The sheet of claim 5 wherein said bonding layer consists of a matte.
Claim 8
Dependent Claim
15 words
The sheet of claim 1 wherein said abrasive particulate consists of pumice or the like.
Claim 9
Dependent Claim
28 words
The sheet of claim 1 wherein abrasive particulate is also carried by and protrudes from the opposite side of the sheet and is exposed at said opposite side.
Claim 10
Dependent Claim
43 words
The sheet of one of claims 8 and 3 wherein the particulate at one side of the sheet has a first fineness, and the particulate at the opposite side of the sheet has a second fineness, said first and second finenesses being different.
Claim 11
Dependent Claim
15 words
The sheet of claim 1 wherein the sheet thickness is between 0.015 and 0.100 inches.
Claim 12
Dependent Claim
23 words
The sheet of claim 10 wherein the sheet thickness is approximately uniform over the sheet area, and is between 0.020 and 0.060 inches.
Claim 13
Dependent Claim
19 words
The sheet of one of claims 1-8 including a stretchable and flexible matte on which said layer is formed.
Claim 14
Independent Claim
57 words
The method of forming flexible cosmetic abrasive sheet, that includes (a) forming a layer of incompletely cured silicone polymer, (b) combining abrasive particulate with said layer to adhere thereto, and (c) allowing said layer to cure to form a sheet with said particulate exposed at one side thereof for intimate rubbing contact with human skin during use.
Claim 15
Independent Claim
57 words
The method of forming flexible cosmetic abrasive sheet, that includes (a) forming a layer of incompletely cured silicone polymer, (b) combining abrasive particulate with said layer to adhere thereto, and (c) allowing said layer to cure to form a sheet with said particulate exposed at one side thereof for intimate rubbing contact with human skin during use.
Claim 16
Dependent Claim
28 words
The method of claim 13 wherein said layer is initially in liquid state and contains a curing agent, and said (c) step includes allowing the liquid to polymerize.
Claim 17
Dependent Claim
20 words
The method of claim 14 wherein said (a) step includes pouring said liquid onto a polyethylene surface at room temperature.
Claim 18
Dependent Claim
24 words
The method claim 13 including forming a second sheet as defined in claim 13 and bonding said two sheets to form a composite sheet.
Claim 19
Dependent Claim
27 words
The method of claim 13 wherein said (b) step is carried out by applying the particulate to the surface of said layer prior to completed curing thereof.
Claim 20
Dependent Claim
21 words
The method of claim 13 wherein said layer is formed to have a thickness between 0.020 and 0.060 inches after curing.
Claim 21
Dependent Claim
19 words
The method of claim 13 which further includes, prior to said (c) step, reducing the thickness of said layer.
Claim 22
Dependent Claim
19 words
The method of claim 19 wherein said reduction in thickness is effected by passing said layer between calender rolls.
Claim 23
Dependent Claim
19 words
The method of claim 20 including removing excess particulate from the sheet after it is passed between said rolls.
Claim 24
Independent Claim
26 words
The method of one of claims 13 and 20 wherein said (b) step includes pressing the particulate into said layer, the particulate consisting essentially of pumice.
Claim 25
Independent Claim
19 words
The method of one of claims 13, 19 and 22, that includes forming said layer on a flexible matte.
Claim 26
Independent Claim
32 words
The method of one of claims 13, 19 and 22 that includes forming said layer on a flexible and stretchable matte, and pressing the particulate into the layer and toward the matte.
Claim 27
Dependent Claim
102 words
A composite cosmetic device, comprising (a) a tough, flexible first sheet of silicone polymer, and having first and second sides, (b) abrasive particulate carried by and protruding from the first side of the sheet and exposed for rubbing contact with human skin or other work, said sheet being stretchable, and being formed from a layer of initially incompletely cured silicone polymer with which said particulate has been combined to adhere to the sheet, the sheet then allowed to cure, and (c) a second sheet of resiliently compressible, reticulated foam attached to said silicone polymer sheet and projecting from said second side thereof.
Claim 28
Dependent Claim
102 words
A composite cosmetic device, comprising (a) a tough, flexible first sheet of silicone polymer, and having first and second sides, (b) abrasive particulate carried by and protruding from the first side of the sheet and exposed for rubbing contact with human skin or other work, said sheet being stretchable, and being formed from a layer of initially incompletely cured silicone polymer with which said particulate has been combined to adhere to the sheet, the sheet then allowed to cure, and (c) a second sheet of resiliently compressible, reticulated foam attached to said silicone polymer sheet and projecting from said second side thereof.
Claim 29
Dependent Claim
17 words
The device of claim 25 wherein said foam consists essentially of polyurethane and has exposed fibrous edges.
Claim 30
Dependent Claim
19 words
The device of claim 25 wherein the foam is fibrous throughout, and has at least about 90% void space.
Claim 31
Dependent Claim
14 words
The device of claim 25 wherein said particulate consists of pumice or the like.
Claim 32
Dependent Claim
35 words
The device of claim 25 including a third sheet, the second sheet having opposite sides one of which is attached to said first sheet, and the other of which is attached to the third sheet.
Claim 33
Dependent Claim
32 words
The device of claim 29 wherein the third sheet consists essentially of silicone polymer, and abrasive particulate carried by the third sheet and exposed at the side thereof opposite said second sheet.
References Cited (Backward Citations)
US2735434A
Cited
US893004A
Cited
US894161A
Cited
US1910647A
Cited
US2091807A
Cited
US2311060A
Cited
US3596661A
Cited
US3653859A
Cited
US3785094A
Cited
US3910284A
Cited
US4034769A
Cited
US4184499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |