US3471791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syllabic detector system
Assignee: International Standard Electric Corp
•
Filing: 1967-07-19
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Granted: 1969-10-07
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Expires: 1987-07-19
Abstract
No abstract record available.
Inventors
- 👤 Robert Walter Alister Scarr
- 👤 George John Preston Barnes
- 👤 Donald Anthony Acott Roworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:52
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/14; H03D1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23288E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |