Patent US3923936A successfully refreshed from Google Patents.
US3923936A
Expired / Lapsed
US
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Method of forming an open-celled resilient capillary device
Assignee: Matek Corp
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Filing: 1972-06-12
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Granted: 1975-12-02
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Expires: 1992-06-12
Abstract
Abstract An open-celled capillary device is provided to control the flow of fluids. The structure includes a resilient matrix, a plurality of cells in fluid-communicating relationship disposed within the matrix, and a plurality of capillary pores distributed over at least the working surface of the matrix in fluid-communicating relationship with the cells. In the preferred embodiment, the diameter of the pores and the diameter of the cells adjacent the working surface are smaller than are the diameters of the cells more remote from the working surface. This configuration permits effective control, both qualitatively and quantitatively, over the flow of liquid at tHe working surface of the matrix.
Inventors
- 👤 William J Davis
- 👤 Anthony J Izbicki
- 👤 Johne Parsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:59
CPC Classifications
B; B41; B41N; B41N7/00; B41N7/06; C; C08; C08J; C08J3/00; C08J3/12; C08J9/00; C08J9/26; B41N2207/00; B41N2207/02; B41N2207/14; Y; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A METHOD FOR FORMING A RESILIENT CAPILLARY DEVICE INCLUDING THE STEPS OF: FOAMING AN AQUEOUS SUSPENSION OF A RESILIENT POLYMER; DISSOLVING A SUGAR IN THE SUSPENSION; CASTING THE FOAMED SUSPENSION INTO A DESIRED CONFIGURATION: HEATING THE SURFACE OF THE CAST SUSPENSION RAPIDLY TO REMOVE THE WATER AND RIGIDIFY THE PORES AND CELLULAR STRUCTURE ADJACENT THERETO MORE RAPIDLY THAN THE CELLS MORE REMOTE FROM THE SURFACE; CONTINUING THE HEATING OF THE CAST SUSPENSION UNTIL IT IS DRIED AND FULLY RIGIDIFIED; AND REMOVING THE SUGAR FROM THE RIGIDIFIED STRUCTURE, WHEREBY IT IS RENDERED RESILIENT.
Claim 2
Independent Claim
92 words
A METHOD FOR FORMING A RESILIENT CAPILLARY DEVICE INCLUDING THE STEPS OF: FOAMING AN AQUEOUS SUSPENSION OF A RESILIENT POLYMER; DISSOLVING A SUGAR IN THE SUSPENSION; CASTING THE FOAMED SUSPENSION INTO A DESIRED CONFIGURATION: HEATING THE SURFACE OF THE CAST SUSPENSION RAPIDLY TO REMOVE THE WATER AND RIGIDIFY THE PORES AND CELLULAR STRUCTURE ADJACENT THERETO MORE RAPIDLY THAN THE CELLS MORE REMOTE FROM THE SURFACE; CONTINUING THE HEATING OF THE CAST SUSPENSION UNTIL IT IS DRIED AND FULLY RIGIDIFIED; AND REMOVING THE SUGAR FROM THE RIGIDIFIED STRUCTURE, WHEREBY IT IS RENDERED RESILIENT.
Claim 3
Dependent Claim
15 words
A method according to claim 1 wherein the heating is achieved by infrared radiant energy.
Claim 4
Dependent Claim
12 words
A method according to claim 1 wherein the polymer is an elastomer.
Claim 5
Dependent Claim
16 words
A method according to claim 3 wherein the heating is continued until the elastomer is cured.
Claim 6
Dependent Claim
15 words
A method according to claim 1 wherein the polymer is a mixture of several polymers.
Claim 7
Dependent Claim
13 words
A method according to claim 5 wherein the mixture includes a vinyl resin.
Claim 8
Dependent Claim
12 words
A method according to claim 6 wherein the mixture includes an elastomer.
Claim 9
Dependent Claim
12 words
A method according to claim 7 wherein the elastomer is a rubber.
Claim 10
Dependent Claim
32 words
A method according to claim 1 wherein the ratio of the parts by weight sugar and the parts by weight polymer is in a range of from about 0.3 to about 1.0.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |