US3535778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical trimming of coated film resistors
Assignee: AT&T Inc
•
Filing: 1968-03-27
•
Granted: 1970-10-27
•
Expires: 1988-03-27
Abstract
No abstract record available.
Inventors
- 👤 Bruno J Falanga
- 👤 Robert A Manning
- 👤 Zoel T Sylvester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; H01C17/242; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3388461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |