US3650804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for decreasing permeability of a porous body and the product thereof
Assignee: United States Atomic Energy Commission
•
Filing: 1969-02-19
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Granted: 1972-03-21
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Expires: 1989-02-19
Abstract
Abstract A process for decreasing the permeability of a porous body and the resulting product wherein a preferably highly fluid synthetic resin sealant is impressed under pressure into pores on one surface of a normally porous body until resin has bled through the body to a desired depth or to an opposite surface completely filling the pores of the body and then curing the synthetic resin sealant in said pores. Such a body may be made impervious to gas pressures exceeding the tensile limit of the body.
Inventors
- 👤 Anthony Parisi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:48
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49993
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
24 words
The process of claim 1 including the step of heating said synthetic resin sealant to a temperature for increasing the fluidity of said sealant.
Claim 2
Dependent Claim
35 words
The process of claim 2 wherein said resin is a thermosetting resin and said curing includes heating said synthetic resin filled body to a curing temperature at least as greaT as the initial heating temperature.
Claim 3
Dependent Claim
69 words
The process of claim 1 including the additional step of cleaning the pores of said body prior to impressing of the resin by subjecting said first surface of said body to a solvent under pressure, bleeding said solvent through said body beginning with pores at said first surface and continuing entirely through said body to said oppositely disposed surface, and thereafter removing said solvent from said body and pores.
Claim 4
Dependent Claim
9 words
The product formed by the process of claim 1.
Claim 5
Dependent Claim
31 words
The process of claim 1 including the step of continuing said impressing and bleeding until said resin bleeds completely through said oppositely disposed surface from said first surface of said body.
Claim 6
Dependent Claim
23 words
The process of claim 6 wherein said impressing pressure is also at least about 25 percent of the tensile limit of said body.
Claim 7
Dependent Claim
26 words
The process of claim 6 comprising the additional step of heating said resin and said body during impregnation for maintaining the fluidity of said synthetic resin.
References Cited (Backward Citations)
US2145291A
Cited
US2376706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |