US4143189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for applying a photo polymer to surfaces
Assignee: Individual
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Filing: 1974-05-08
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Granted: 1979-03-06
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Expires: 1994-05-08
Abstract
Abstract A method for applying a liquid photo polymer to a surface such that the photo polymer is uniform and holiday-free, the method comprising obtaining a plastic sponge and impregnating the plastic sponge with a liquid photo polymer comprising a solvent which slowly reacts with the plastic from which the sponge is formed. Thereafter, the sponge is brushed and/or drawn across the surface to deposit the photo polymer thereon, the application of the photo polymer being accomplished before the solvent in the photo polymer substantially disintegrates the sponge.
Inventors
- 👤 Jack L. Woods
- 👤 Craig P. Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:11
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
59 words
In a method of distributing a photo polymer over a surface, the steps of absorbing liquid photo polymer into a plastic sponge; allowing solvent in the photo polymer to chemically react with and at least partially soften at least the exterior of the sponge; and drawing at least a portion of the photo polymer impregnated sponge across the surface.
Claim 2
Dependent Claim
59 words
In a method of distributing a photo polymer over a surface, the steps of absorbing liquid photo polymer into a plastic sponge; allowing solvent in the photo polymer to chemically react with and at least partially soften at least the exterior of the sponge; and drawing at least a portion of the photo polymer impregnated sponge across the surface.
Claim 3
Dependent Claim
48 words
A method as defined in claim 1 wherein said allowing step comprises contacting the solvent in the photo polymer with the sponge for a time increment which is long enough to effect slight dissolution of peripheral portions of the sponge but insufficient to cause the sponge to disintegrate.
Claim 4
Independent Claim
93 words
A method of applying a photo polymer to a surface comprising the steps of: obtaining a liquid photo polymer comprising a solvent; obtaining a sponge applicator, the sponge comprising a synthetic open cellular material which is subject to slow dissolution by the solvent of the photo polymer; absorbing the liquid photo polymer into the sponge applicator; softening at least the exterior of the sponge with the solvent; and applying the liquid photo polymer to the surface by drawing the sponge applicator across the surface before the solvent causes the sponge to substantially disintegrate.
Claim 5
Independent Claim
93 words
A method of applying a photo polymer to a surface comprising the steps of: obtaining a liquid photo polymer comprising a solvent; obtaining a sponge applicator, the sponge comprising a synthetic open cellular material which is subject to slow dissolution by the solvent of the photo polymer; absorbing the liquid photo polymer into the sponge applicator; softening at least the exterior of the sponge with the solvent; and applying the liquid photo polymer to the surface by drawing the sponge applicator across the surface before the solvent causes the sponge to substantially disintegrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |