Patent US3734567A successfully refreshed from Google Patents.
Patent US3615474A successfully refreshed from Google Patents.
US3615474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a grid layout for printed circuitry
Assignee: RUDY D ROSENBERGER
•
Filing: 1968-03-08
•
Granted: 1971-10-26
•
Expires: 1988-03-08
Abstract
Abstract A method of making a dotted-line grid layout for printed circuitry is disclosed. A solid-line grid is photographically reproduced to obtain a positive which is then used to prepare a negative wherein the grid is of dotted lines. Thereafter, the dotted-line grid negative is combined with a layout negative. The combined negatives are then photographically reproduced and thereafter circuitry may be simulated by application of tape on the dotted-line grid.
Inventors
- 👤 Rudy D Rosenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:02
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/90
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
56 words
A method in accordance with claim 1 including the steps of making a third negative of a basic layout, said third negative being adapted to carry indicia related to circuitry to be put on said grid, combining said second and third negatives to form a master negative, and making said final positive from said master negative.
Claim 2
Dependent Claim
36 words
A method in accordance with claim 2 wherein said master negative is formed by providing an opening in said third negative, inserting said second negative into said opening, and mechanically joining said second and third negatives.
Claim 3
Dependent Claim
21 words
A method in accordance with claim 2 wherein said master negative is formed by photographically combining said second and third negatives.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |