Patent US3540831A successfully refreshed from Google Patents.
US3540831A
Expired / Lapsed
US
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Indicium locating apparatus
Assignee: GCA Corp
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Filing: 1966-06-01
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Granted: 1970-11-17
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Expires: 1986-06-01
Abstract
No abstract record available.
Inventors
- 👤 Howard B Lovering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:47
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/02; G01B11/03; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34
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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |