US2679474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making optical zone plates
Assignee: Individual
•
Filing: 1949-12-31
•
Granted: 1954-05-25
•
Expires: 1969-12-31
Abstract
No abstract record available.
Inventors
- 👤 Pajes Wolf Szmul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:47
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/18; G02B5/1876; G21; G21K; G21K1/00; G21K1/06; G21K7/00; G21K2201/00; G21K2201/06; G21K2201/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE METHOD OF MAKING A ZONE PLATE WHICH COMPRISES THE STEPS OF PROVIDING A PIECE OF WIRE HAVING A DIAMETER EQUAL TO 2$F$ WHERE F EQUALS THE DESIRED FOCAL LENGTH OF THE ZONE PLATE AND $ EQUALS THE WAVE LENGTH OF THE RADIATION WITH WHICH IT IS TO BE USED, ELECTROPLATING METAL LAYERS SUCCESSIVELY ON THE WIRE HAVING OUTER DIAMETERS DETERMINED BY THE EQUATIONS: D=2$F$N, WHERE N TAKES ON THE VALUES OF SUCCESSIVE INTEGERS, STARTING WITH N=2, FOR SUCCESSIVE LAYERS, ALTERNATE OF SAID WIRE AND LAYERS BEING FORMED OF A METAL WHICH IS DISSOVLABLE IN A PREDETERMINED LIQUID AND THE REMAINDER BEING FORMED OF A METAL WHICH IS NON-DISSOLVABLE IN SAID LIQUID, CUTTING OFF A SLICE OF SAID WIRE SO PLATED, AND DISSOLVING OUT THE DISSOLVABLE METAL IN THE SLICE EXCEPT FOR THIN STRIPS OF SOLID METAL BETWEEN ALTERNATE LAYERS FOR HOLDING TOGETHER THE CONCENTRIC RINGS OF THE NONDISSOLVABLE METAL.
Claim 2
Independent Claim
150 words
THE METHOD OF MAKING A ZONE PLATE WHICH COMPRISES THE STEPS OF PROVIDING A PIECE OF WIRE HAVING A DIAMETER EQUAL TO 2$F$ WHERE F EQUALS THE DESIRED FOCAL LENGTH OF THE ZONE PLATE AND $ EQUALS THE WAVE LENGTH OF THE RADIATION WITH WHICH IT IS TO BE USED, ELECTROPLATING METAL LAYERS SUCCESSIVELY ON THE WIRE HAVING OUTER DIAMETERS DETERMINED BY THE EQUATIONS: D=2$F$N, WHERE N TAKES ON THE VALUES OF SUCCESSIVE INTEGERS, STARTING WITH N=2, FOR SUCCESSIVE LAYERS, ALTERNATE OF SAID WIRE AND LAYERS BEING FORMED OF A METAL WHICH IS DISSOVLABLE IN A PREDETERMINED LIQUID AND THE REMAINDER BEING FORMED OF A METAL WHICH IS NON-DISSOLVABLE IN SAID LIQUID, CUTTING OFF A SLICE OF SAID WIRE SO PLATED, AND DISSOLVING OUT THE DISSOLVABLE METAL IN THE SLICE EXCEPT FOR THIN STRIPS OF SOLID METAL BETWEEN ALTERNATE LAYERS FOR HOLDING TOGETHER THE CONCENTRIC RINGS OF THE NONDISSOLVABLE METAL.
References Cited (Backward Citations)
US1165558A
Cited
GB230456A
Cited
US1621814A
Cited
US1654936A
Cited
US1891332A
Cited
US2091863A
Cited
US2301975A
Cited
US2287123A
Cited
US2340485A
Cited
US2418432A
Cited
US2457092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |