Patent US3190778A successfully refreshed from Google Patents.
US3190778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating masking sheets
Assignee: Clevite Corp
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Filing: 1961-06-19
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Granted: 1965-06-22
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Expires: 1981-06-19
Abstract
No abstract record available.
Inventors
- 👤 Dahlberg Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:38
CPC Classifications
H; H01; H01B; H01B1/00; C; C23; C23C; C23C14/00; C23C14/04; C23C14/042; C23F; C23F1/00; C23F1/02; C25; C25D; C25D1/00; C25D1/08; H10; H10P; H10P95/00; Y; Y10; Y10T; Y10T29/00; Y10T29/30; Y10T29/301; Y10T29/308
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF FABRICATING THIN METALLIC SHEETS CONTAINING MINUTE, CLOSELY SPACED PERFORATIONS, WHICH INCLUDES; PROVIDING A PLATE OF RELATIVELY HARD, EFFECTIVELY TRANSLUCENT MATERIAL HAVING ON A MAJOR SURFACE A THIN EFFECTIVELY OPAQUE COATING OF RELATIVELY SOFTER MATERIAL; ENGRAVING SAID SURFACE SO AS TO SELECTIVELY REMOVE PORTIONS OF SAID COATING IN A PRECISE PREDETERMINED PATTERN OF FINE INTERSECTING LINES; PROVIDING A SHEET OF METAL FOIL HAVING A PHOTOSENSITIVE COATING; EXPOSING THE PHOTOSENSITIVE COATING OF SAID METAL FOIL TO PHOTOEFFECTIVE ILLIMINATION THROUGH SAID PATTERN TO PRODUCE AN IMAGE OF SAID PATTERN ON THE PHOTOSENSITIVE COATING WITHOUT CHANGE OF SCALE; SUBJECTING THE EXPOSED METAL FORIL TO A DEVELOPMENT
Claim 2
Independent Claim
105 words
A METHOD OF FABRICATING THIN METALLIC SHEETS CONTAINING MINUTE, CLOSELY SPACED PERFORATIONS, WHICH INCLUDES; PROVIDING A PLATE OF RELATIVELY HARD, EFFECTIVELY TRANSLUCENT MATERIAL HAVING ON A MAJOR SURFACE A THIN EFFECTIVELY OPAQUE COATING OF RELATIVELY SOFTER MATERIAL; ENGRAVING SAID SURFACE SO AS TO SELECTIVELY REMOVE PORTIONS OF SAID COATING IN A PRECISE PREDETERMINED PATTERN OF FINE INTERSECTING LINES; PROVIDING A SHEET OF METAL FOIL HAVING A PHOTOSENSITIVE COATING; EXPOSING THE PHOTOSENSITIVE COATING OF SAID METAL FOIL TO PHOTOEFFECTIVE ILLIMINATION THROUGH SAID PATTERN TO PRODUCE AN IMAGE OF SAID PATTERN ON THE PHOTOSENSITIVE COATING WITHOUT CHANGE OF SCALE; SUBJECTING THE EXPOSED METAL FORIL TO A DEVELOPMENT
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |