US3354543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming holes through circuit boards
Assignee: Bunker Ramo Corp
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Filing: 1965-06-09
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Granted: 1967-11-28
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Expires: 1985-06-09
Abstract
No abstract record available.
Inventors
- 👤 Lawrence Robert
- 👤 John N Leonard
- 👤 Robert C Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:48
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/4038; H05K3/4084; C; C23; C23F; C23F1/00; C23F1/02; H05K3/0011; H05K3/0017; H05K3/002; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; H05K2203/00; H05K2203/05; H05K2203/0548; H05K2203/0554; H05K2203/06; H05K2203/063; H05K2203/07; H05K2203/0736; H05K2203/0746; H05K2203/0779; H05K2203/0786; H05K2203/0789; H05K2203/11; H05K2203/1184; H05K2203/15; H05K2203/1572; H05K3/42; H05K3/425; H05K3/427; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155; Y10T29/49165; Y10T29/49167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF FORMING AN APERTURE THROUGH A SHEET OF FILLED MATERIAL WHERE AT LEAST ONE SUFACE OF SAID SHEET HAS A LAYER OF MATERIAL ADHERED THERETO WHICH IS CHEMICALLY DIFFERENT FROM SAID SHEET, COMPRISING THE STEPS OF: FORMING A HOLE IN SAID LAYER TO EXPOSE SAID SHEET AND THEN ALTERNATING BETWEEN STEPS OF; FIRST, APPLYING A SOLUTION TO SAID SHEET THROUGH SAID HOLE, SAID SOLUTION BEING OF A CHARACTER WHICH CHEMICALLY ATTACKS SAID SHEET MATERIAL TO AT LEAST SOFTEN THE SAME WHILE HAVING RELATIVELY NO EFFECT ON SAID LAYER OF MAERIAL ADHEREED TO SAID SHEET;
Claim 2
Independent Claim
96 words
A METHOD OF FORMING AN APERTURE THROUGH A SHEET OF FILLED MATERIAL WHERE AT LEAST ONE SUFACE OF SAID SHEET HAS A LAYER OF MATERIAL ADHERED THERETO WHICH IS CHEMICALLY DIFFERENT FROM SAID SHEET, COMPRISING THE STEPS OF: FORMING A HOLE IN SAID LAYER TO EXPOSE SAID SHEET AND THEN ALTERNATING BETWEEN STEPS OF; FIRST, APPLYING A SOLUTION TO SAID SHEET THROUGH SAID HOLE, SAID SOLUTION BEING OF A CHARACTER WHICH CHEMICALLY ATTACKS SAID SHEET MATERIAL TO AT LEAST SOFTEN THE SAME WHILE HAVING RELATIVELY NO EFFECT ON SAID LAYER OF MAERIAL ADHEREED TO SAID SHEET;
References Cited (Backward Citations)
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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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |