US3186884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing grid plates
Assignee: US Philips Corp
•
Filing: 1961-04-21
•
Granted: 1965-06-01
•
Expires: 1981-04-21
Abstract
No abstract record available.
Inventors
- 👤 Haan Edward Fokko De
- 👤 Jonkers Johannes Jose Antonius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:56
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/14; H01J9/142; C; C23; C23F; C23F1/00; C23F1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD OF MANUFACTURING GRID PLATES HAVING PARALLEL METAL STRIPS COMPRISING THE STEPS, PROVIDING A METAL PLATE WITH A PLURALITY OF PARALLEL ROWS OF APERTURES IN WHICH THE DISTANCE BETWEEN APERTURES IN A ROW IS LESS THAN THE DISTANCE BETWEEN APERTURES IN ADJACENT ROWS, COVERING ONLY ONE SIDE OF AT LEAST PORTIONS OF THE PLATE BETWEEN APERTURES IN EACH ROW WITH AN ELECTRICALLY INSULATING MATERIAL, AND SUBJECTING THE THUS-COVERED PLATE TO THE ACTION OF AN ETCHING AGENT WHICH ACTS UPON THE METAL BUT WHICH IS SUBSTANTIALLY INERT TOWARD SAID INSULATING MATERIAL FOR A TIME SUFFICIENT FOR THE APERTURES IN A ROW TO ENLARGE AND FORM A CONTINUOUS GAP IN THE METAL PLATE WITH BRIDGES OF INSULATING MATERIAL ACROSS THE GAP WHILE BETWEEN ADJACENT ROWS A CONTINUOUS METAL STRIP IS RETAINED.
Claim 2
Independent Claim
130 words
A METHOD OF MANUFACTURING GRID PLATES HAVING PARALLEL METAL STRIPS COMPRISING THE STEPS, PROVIDING A METAL PLATE WITH A PLURALITY OF PARALLEL ROWS OF APERTURES IN WHICH THE DISTANCE BETWEEN APERTURES IN A ROW IS LESS THAN THE DISTANCE BETWEEN APERTURES IN ADJACENT ROWS, COVERING ONLY ONE SIDE OF AT LEAST PORTIONS OF THE PLATE BETWEEN APERTURES IN EACH ROW WITH AN ELECTRICALLY INSULATING MATERIAL, AND SUBJECTING THE THUS-COVERED PLATE TO THE ACTION OF AN ETCHING AGENT WHICH ACTS UPON THE METAL BUT WHICH IS SUBSTANTIALLY INERT TOWARD SAID INSULATING MATERIAL FOR A TIME SUFFICIENT FOR THE APERTURES IN A ROW TO ENLARGE AND FORM A CONTINUOUS GAP IN THE METAL PLATE WITH BRIDGES OF INSULATING MATERIAL ACROSS THE GAP WHILE BETWEEN ADJACENT ROWS A CONTINUOUS METAL STRIP IS RETAINED.
References Cited (Backward Citations)
US2621303A
Cited
US2565623A
Cited
US2610305A
Cited
US2663821A
Cited
US2721952A
Cited
US2885524A
Cited
US2738438A
Cited
US2762036A
Cited
US2881059A
Cited
US3020433A
Cited
US3116191A
Cited
US2849299A
Cited
US2958147A
Cited
US2981610A
Cited
US2988667A
Cited
US3081210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |