US3617340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for copperizing aluminum offset plates coated with an exposed and developed water-soluble resist
Assignee: RR Donnelley and Sons Co
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Filing: 1968-10-22
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Granted: 1971-11-02
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Expires: 1988-10-22
Abstract
Abstract A copperizing solution for aluminum surfaces comprising a water miscible organic solvent for cuprous chloride which will not dissolve gum arabic; a cuprous salt such as the chloride; hydrochloric acid; an aminoborane; and a trialkylphosphine.
Inventors
- 👤 Lawrence E Thielen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:06
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38; C23C18/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
25 words
A solution according to claim 1 in which said cuprous salt is cuprous chloride, said amino borane is dimethylamine borane, and said alkylphosphine is tributylphosphine.
Claim 2
Dependent Claim
47 words
A method of copperizing an aluminum offset plate coated with an exposed and developed water-soluble resist, said method comprising contacting said plate with a solution according to claim 1 and thereafter rinsing said plate with an organic solvent for cuprous chloride which will not dissolve gum arabic.
Claim 3
Dependent Claim
48 words
A method of copperizing an aluminum offset plate coated with an exposed and developed water soluble resist, said method comprising contacting said plate with a solution according to claim 2 and thereafter rinsing said plate with an organic solvent for cuprous chloride which will not dissolve gum arabic.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |