Patent US3374886A successfully refreshed from Google Patents.
Patent US3607585A successfully refreshed from Google Patents.
US3607585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board artwork pad
Assignee: GTE Sylvania Inc
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Filing: 1968-11-29
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Granted: 1971-09-21
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Expires: 1988-11-29
Abstract
Abstract Artwork for printed circuit boards with plated-through holes is made with terminal area pads having center openings covered with an optical filter, preferably a colored strip. These pads permit photographic techniques to be used in making circuit pattern transparencies with and without pad center hole images and thus simplify this part of the process of making such printed circuit boards. The pads are formed by successively punching center openings in a continuous sheet of pad material, adhesively pressing a like sheet of filter material against the perforate sheet, cutting the pad shape in the double laminate, and removing the severed pads from the parent stock.
Inventors
- 👤 Art E Cassingham
- 👤 Arvin C Skyrud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:37
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/0002; H05K3/40; H05K3/42; H05K1/00; H05K1/02; H05K1/11; H05K1/115; H05K1/116; H05K2203/00; H05K2203/05; H05K2203/0548; H05K2203/056; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T428/00; Y10T428/16; Y10T428/162; Y10T428/21; Y10T428/218; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
The pad according to claim 1 in which said filter is translucent and colored.
Claim 2
Dependent Claim
18 words
The pad according to claim 1 in which said filter and said piece have the same external dimensionS.
Claim 3
Dependent Claim
17 words
A printed circuit board artwork pad having an opening therein and an optical filter covering said opening.
Claim 4
Dependent Claim
14 words
The pad according to claim 4 in which said filter is translucent and colored.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |