US3180751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a composite article
Assignee: Bausch and Lomb Inc
•
Filing: 1961-05-26
•
Granted: 1965-04-27
•
Expires: 1981-05-26
Abstract
No abstract record available.
Inventors
- 👤 James R Law
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:11
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/34; C; C23; C23F; C23F4/00; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
A METHOD OF FORMING A RETICLE HAVING A SYSTEM OF RELATED PREDETERMINED SHAPES ON A SURFACE OF A SUBSTRATE COMPRISING THE STEP OF VACUUM DEPOSITING A FILM OF IRON NICKEL CHROMIUM ALLOY ON THE SURFACE OF THE SUBSTRATE, COVERING THE SURFACE OF THE SUBSTRATE WITH A LIGHT REACTIVE RESIST MATERIAL, SPINNING THE SUBSTRATE TO THEREBY SPREAD THE RESIST INTO A RELATIVELY UNIFORM LAYER, LIGHT HARDENEING PORTIONS OF THE RESIST BY EXPOSING SELECTED PORTIONS OF THE RESIST MATERIAL TO ULTRAVIOLET LIGHT AND REMOVING THE UNHARDENED RESIST TO FORM A MASK COVERING THE SURFACE OF THE BODY EXCLUDING THE PRESELECTED AREAS, PLACING THE SOURCE OF ELECTRONS WITH THE MASKED SURFACE RELATIVELY CLOSE TO THE ANODE WITH RESPECT TO ITS DISTANCE FROM THE ELECTRON SOURCE AND FACING THE SOURCE OF ELECTRONS, SUBJECTING THE MASKED SUBSTRATE TO A REDUCED PRESSURE OF BETWEEN 10 AND 20 MICRONS OF MERCURY, AND SUBJECTING THE SURFACE OF SAID MASKED SUBSTRATE TO THE ACTION OF AN ELECTRIC GLOW DISCHARGE HAVING A POTENTIAL OF BETWEEN 3,000 AND 4,000 VOLTS WHEREBY THE IRON NICKEL CHROMIUM ALLOY IS REMOVED FROM THE PRESELECTED AREAS LEAVING A SYSTEM OF RELATED PREDETERMINED SHAPES ON THE SURFACE OF THE SUBSTRATE.
Claim 2
Independent Claim
194 words
A METHOD OF FORMING A RETICLE HAVING A SYSTEM OF RELATED PREDETERMINED SHAPES ON A SURFACE OF A SUBSTRATE COMPRISING THE STEP OF VACUUM DEPOSITING A FILM OF IRON NICKEL CHROMIUM ALLOY ON THE SURFACE OF THE SUBSTRATE, COVERING THE SURFACE OF THE SUBSTRATE WITH A LIGHT REACTIVE RESIST MATERIAL, SPINNING THE SUBSTRATE TO THEREBY SPREAD THE RESIST INTO A RELATIVELY UNIFORM LAYER, LIGHT HARDENEING PORTIONS OF THE RESIST BY EXPOSING SELECTED PORTIONS OF THE RESIST MATERIAL TO ULTRAVIOLET LIGHT AND REMOVING THE UNHARDENED RESIST TO FORM A MASK COVERING THE SURFACE OF THE BODY EXCLUDING THE PRESELECTED AREAS, PLACING THE SOURCE OF ELECTRONS WITH THE MASKED SURFACE RELATIVELY CLOSE TO THE ANODE WITH RESPECT TO ITS DISTANCE FROM THE ELECTRON SOURCE AND FACING THE SOURCE OF ELECTRONS, SUBJECTING THE MASKED SUBSTRATE TO A REDUCED PRESSURE OF BETWEEN 10 AND 20 MICRONS OF MERCURY, AND SUBJECTING THE SURFACE OF SAID MASKED SUBSTRATE TO THE ACTION OF AN ELECTRIC GLOW DISCHARGE HAVING A POTENTIAL OF BETWEEN 3,000 AND 4,000 VOLTS WHEREBY THE IRON NICKEL CHROMIUM ALLOY IS REMOVED FROM THE PRESELECTED AREAS LEAVING A SYSTEM OF RELATED PREDETERMINED SHAPES ON THE SURFACE OF THE SUBSTRATE.
References Cited (Backward Citations)
US2447836A
Cited
US2421607A
Cited
US2420724A
Cited
US2584612A
Cited
GB754101A
Cited
US2702274A
Cited
GB779347A
Cited
US2923624A
Cited
US2877338A
Cited
GB812713A
Cited
US3061911A
Cited
US3046176A
Cited
US3118050A
Cited
US3113896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |