Patent US2940873A successfully refreshed from Google Patents.
US2940873A
Expired / Lapsed
US
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Method of increasing the thickness of fine mesh metal screens
Assignee: TDK Micronas GmbH
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Filing: 1957-07-18
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Granted: 1960-06-14
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Expires: 1977-07-18
Abstract
No abstract record available.
Inventors
- 👤 Toohig Michael Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; C; C23; C23C; C23C14/00; C23C14/04; C23C14/046; H01J19/00; H01J9/00; H01J9/02; H01J9/14; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/0022; H01J2893/0023; Y; Y10; Y10S; Y10S55/00; Y10S55/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF INCREASING THE THICKNESS OF A FLAT METAL SCREEN HAVING A MESH FINER THAN 300 AND BEING FORMED IN A SPHERICAL CONFIGURATION WITHOUT SUBSTANTIAL FILLING OF THE APERTURES THEREIN COMPRISING THE STEPS OF: POSITIONING A RECEPTACLE IN A CONTAINER, PLACING A QUANTITY OF METAL IN SAID RECEPTACLE, POSITIONING THE SCREEN IN SAID CONTAINER SPACED ABOVE A POINT IN SAID RECEPTACLE WITH SAID POINT BEING LOCATED AT THE CENTER OF CURVATURE OF SAID SCREEN, EVACUATING SAID CONTAINER, HEATING SAID RECEPTACLE TO A TEMPERATURE SUFFICIENT TO MELT AND BOIL SAID METAL THEREIN WHEREBY THE VAPOR FORMED BY SAID BOILING EMANATES FROM SAID POINT AND IS DISPOSED ON THE SURFACE OF SAID SCREEN, AND CONTINUING SAID HEATING UNTIL THE THICKNESS OF SAID SCREEN IS SUBSTANTIALLY INCREASED.
Claim 2
Independent Claim
125 words
THE METHOD OF INCREASING THE THICKNESS OF A FLAT METAL SCREEN HAVING A MESH FINER THAN 300 AND BEING FORMED IN A SPHERICAL CONFIGURATION WITHOUT SUBSTANTIAL FILLING OF THE APERTURES THEREIN COMPRISING THE STEPS OF: POSITIONING A RECEPTACLE IN A CONTAINER, PLACING A QUANTITY OF METAL IN SAID RECEPTACLE, POSITIONING THE SCREEN IN SAID CONTAINER SPACED ABOVE A POINT IN SAID RECEPTACLE WITH SAID POINT BEING LOCATED AT THE CENTER OF CURVATURE OF SAID SCREEN, EVACUATING SAID CONTAINER, HEATING SAID RECEPTACLE TO A TEMPERATURE SUFFICIENT TO MELT AND BOIL SAID METAL THEREIN WHEREBY THE VAPOR FORMED BY SAID BOILING EMANATES FROM SAID POINT AND IS DISPOSED ON THE SURFACE OF SAID SCREEN, AND CONTINUING SAID HEATING UNTIL THE THICKNESS OF SAID SCREEN IS SUBSTANTIALLY INCREASED.
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |