US4487662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition method for check valve
Assignee: Xerox Corp
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Filing: 1982-09-20
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Granted: 1984-12-11
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Expires: 2002-09-20
Abstract
Abstract A check valve for a drop-on-demand pressure pulse ejector for preventing pressure pulse loss to the liquid supply system. The check valve is made by electrodeposition onto the surface of a substrate.
Inventors
- 👤 Kenneth H. Fischbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:48
CPC Classifications
F; F16; F16K; F16K99/00; F16K99/0001; B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/04; B41J2/045; B41J2/055; F15; F15C; F15C5/00; F16K99/0003; F16K99/0005; F16K99/0007; F16K99/0034; F16K99/0055; F16K99/0057; B41J2202/00; B41J2202/01; B41J2202/05; F16K2099/0082; F16K2099/0092; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/7888; Y10T137/7891; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49421
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
The method of forming a check valve by electrochemical deposition on a substrate for a pulsed pressure drop ejecting apparatus which comprises: (a) providing a substrate having a surface adapted for electrochemical deposition thereon, said substrate including a channel therethrough; (b) plugging said channel with a removable plug; (c) forming a substantially "U"-shaped pattern on said surface of said substrate encompassing said plug of a material which will inhibit electrochemical deposition; (d) providing on said surface of said substrate within said substantially "U"-shaped pattern of inhibiting material a passivating material which is electrically conductive and tenously bonded to said surface; (e) electrochemically depositing a layer on said surface and said passivating material until a deposition of the desired thickness is formed; and (f) removing said removable plug.
Claim 2
Independent Claim
127 words
The method of forming a check valve by electrochemical deposition on a substrate for a pulsed pressure drop ejecting apparatus which comprises: (a) providing a substrate having a surface adapted for electrochemical deposition thereon, said substrate including a channel therethrough; (b) plugging said channel with a removable plug; (c) forming a substantially "U"-shaped pattern on said surface of said substrate encompassing said plug of a material which will inhibit electrochemical deposition; (d) providing on said surface of said substrate within said substantially "U"-shaped pattern of inhibiting material a passivating material which is electrically conductive and tenously bonded to said surface; (e) electrochemically depositing a layer on said surface and said passivating material until a deposition of the desired thickness is formed; and (f) removing said removable plug.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |