US3520624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microdensitometric apparatus for simultaneously examining a plurality of record image areas
Assignee: Technical Operations Inc
•
Filing: 1966-05-10
•
Granted: 1970-07-14
•
Expires: 1986-05-10
Abstract
No abstract record available.
Inventors
- 👤 Ronald H Johnson
- 👤 Carlton S Miller
- 👤 Frederick G Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:32
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/59; G01N21/5907; G01N21/5911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2469935A
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US2528924A
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US2478406A
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US2450319A
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US2626989A
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US2834247A
Cited
US3053181A
Cited
US3244062A
Cited
US3255355A
Cited
US3270348A
Cited
US3246334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |