US2923624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making reticles
Assignee: Bausch and Lomb Inc
•
Filing: 1954-09-15
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Granted: 1960-02-02
•
Expires: 1974-09-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Hensler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:16
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/32; G03; G03F; G03F1/00; G03F1/54; G03F1/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF PRODUCING AN OPAQUE RETICLE DESIGN ON A TRANSPARENT LEAD GLASS PLATE WHICH COMPRISES COATING THE SURFACE OF THE PLATE WHICH A THIN TRANSPARENT LAYER OF MAGNESIUM FLUORIDE, REMOVING A PORTION OF SAID LAYER OF MAGNESIUM FLUORIDE TO EXPOSE THE SURFACE OF THE PLATE IN THE FORM OF A RETICLE DESIGN, AND HEATING SAID PLATE IN HYDROGEN GAS WHEREBY THE LEAD IN THE EXPOSED SURFACE OF THE PLATE WILL BE REDUCED BY SAID HYDROGEN GAS TO FORM THE OPAQUE RETICLE DESIGN PERMANENTLY INTO THE SURFACE OF THE PLATE.
Claim 2
Independent Claim
90 words
THE METHOD OF PRODUCING AN OPAQUE RETICLE DESIGN ON A TRANSPARENT LEAD GLASS PLATE WHICH COMPRISES COATING THE SURFACE OF THE PLATE WHICH A THIN TRANSPARENT LAYER OF MAGNESIUM FLUORIDE, REMOVING A PORTION OF SAID LAYER OF MAGNESIUM FLUORIDE TO EXPOSE THE SURFACE OF THE PLATE IN THE FORM OF A RETICLE DESIGN, AND HEATING SAID PLATE IN HYDROGEN GAS WHEREBY THE LEAD IN THE EXPOSED SURFACE OF THE PLATE WILL BE REDUCED BY SAID HYDROGEN GAS TO FORM THE OPAQUE RETICLE DESIGN PERMANENTLY INTO THE SURFACE OF THE PLATE.
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |