US3544287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of multilayered thin film structures employing oxide parting layers
Assignee: AT&T Inc
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Filing: 1967-04-13
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Granted: 1970-12-01
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Expires: 1987-04-13
Abstract
No abstract record available.
Inventors
- 👤 Donald Jex Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:11
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/01; H01; H01C; H01C1/00; H01C1/14; H01C1/142; H01C17/00; H01C17/06; H01C17/075; H01C17/08; H01C17/30; H10D86/00; H10D86/01; H10N; H10N97/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099; Y10T29/49117; Y10T29/49124; Y10T29/4913
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) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |