US3474412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Error detection and correction equipment
Assignee: International Standard Electric Corp
•
Filing: 1965-10-20
•
Granted: 1969-10-21
•
Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey Charles Rowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:23
CPC Classifications
H; H03; H03M; H03M13/00; H03M13/03; H03M13/05; H03M13/13; H03M13/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124783A
Cited
USRE23601E
Cited
US2848532A
Cited
US2910235A
Cited
US2950464A
Cited
US3222643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |