Patent US3577325A successfully refreshed from Google Patents.
US3577325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reclaiming graphite mask
Assignee: AT&T Inc
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Filing: 1968-05-29
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Granted: 1971-05-04
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Expires: 1988-05-29
Abstract
Abstract A PALLET AND A MASK FOR USE IN THE MANUFACTURE OF THIN FILM COMPONENTS ARE MACHINES FROM A BLOCK OF HIGH DENSITY FINE GRAIN PRESSED GRAPHITE TO THE DESIRED SIZE AND SHAPE. THE GRAPHITE PALLET AND MASK ARE PLATED WITH A FLASH OF COPPER SO THAT THE COPPER MAY BE DISSOLVED OR REACTED WITH AN ACID TO RELEASE THE LAYER OF PRECIOUS METALS WHICH ACCUMULATE DURING REPEATED USE OF THE PALLET AND MASK. THIN FILM SUBSTRATES ARE PLACED IN THE PALLET AND COVERED BY THE MASK. IN USE, THE ASSEMBLED PALLET AND MASK ARE INVERTED SUCH THAT GRAVITY FORCES THE SUBSTRATES AGAINST THE MASK TO INSURE THAT THE METAL IS DEPOSITED ONLY ON THE DESIRED AREAS OF THE SUBSTRATE.
Inventors
- 👤 Albert R Fairchild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:42
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/04; C23C14/042; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |