US3487522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayered thin-film intermediates employing parting layers to permit selective,sequential etching
Assignee: AT&T Inc
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Filing: 1966-02-01
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Granted: 1970-01-06
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Alfred J Harendza-Harinxma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:11
CPC Classifications
H; H01; H01B; H01B1/00; C; C23; C23F; C23F1/00; C23F1/02; H10; H10N; H10N97/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/12576; Y10T428/12597; Y10T428/12681; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |