← Back to Patent Explorer
US3729388A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of preparing at least one conductive form

Assignee: AT&T Inc
•
Filing: 1970-12-10
•
Granted: 1973-04-24
•
Expires: 1990-12-10
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A METHOD OF PREPARING CONDUCTIVE PATTERNS COMPRISES DEPOSITING A THIN METALLIC FORM OR PATTERN ON A BASE MATERIAL COMPRISING A VALVE METAL. THE VALVE METAL BASE WITH THE DEPOSITED PATTERN THEREON IS THEN SUBJECTED TO AN ELECTROLYTIC PLATING TREATMENT IN WHICH ONLY THE PATTERN AND NOT THE BASE IS ELECTROPLATED AND BUILT UP TO A DESIRED THICKNESS. A BACKGROUND SUPPORT OR SUBSTRATE, HAVING AT LEAST ONE SURFACE RENDERED ADHESIVE, MAY THEN BE CONTACTED WITH THE BUILT-UP PATTERN AT THE ADHESIVE SURFACE, PRESSURE IS THEN MAINTAINED ALONG THE SUBSTRATE SUFFICIENT TO (1) INSURE THE SUBSEQUENT REMOVAL OF THE PATTERN FROM THE BASE WHEN THE SUBSTRATE IS REMOVED FROM CONTACT THEREWITH AND (2) INSURE THE TEMPORARY RETENTION OF THE PATTERNS ON THE SUBSTRATE. THE RETENTION OF THE PATTERNS MAY THEN BE RENDERED PERMANENT.

Inventors

  • 👤 Angelo M De
  • 👤 D Sharp

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 20:00
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/205; C; C25; C25D; C25D5/00; C25D5/02; H05K2203/00; H05K2203/01; H05K2203/0104; H05K2203/0117; H05K2203/07; H05K2203/0703; H05K2203/0726

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-04-23 1976-10-23 1977-04-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-23 1980-10-23 1981-04-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-23 1984-10-23 1985-04-24 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag