Patent US3493771A successfully refreshed from Google Patents.
US3493771A
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US
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Length monitoring system
Assignee: RCA Corp
•
Filing: 1967-07-25
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Granted: 1970-02-03
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Expires: 1987-07-25
Abstract
No abstract record available.
Inventors
- 👤 John P Beltz
- 👤 Harold B Currie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
G; G06; G06K; G06K13/00; G06K13/02; G06K13/06; G06K13/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2809297A
Cited
US3026419A
Cited
US3046538A
Cited
US3159749A
Cited
US3320430A
Cited
US3349905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |