US2989385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for ion bombarding and etching metal
Assignee: AT&T Inc
•
Filing: 1957-05-14
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Granted: 1961-06-20
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Expires: 1977-05-14
Abstract
No abstract record available.
Inventors
- 👤 Umberto F Gianola
- 👤 Leila V Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:50
CPC Classifications
H; H10; H10P; H10P30/00; H10P30/20; H10P30/202; H10P30/204; C; C01; C01B; C01B33/00; C01B33/08; C22; C22F; C22F1/00; C22F1/16; H01; H01J; H01J37/00; H01J37/32; H01J37/34; H10P30/208; H10P50/00; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563503A
Cited
US2462218A
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US2583681A
Cited
US2602211A
Cited
GB695178A
Cited
US2597028A
Cited
US2656496A
Cited
US2787564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |