US2930898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube apparatus for the inspection of articles
Assignee: W D ENGINEERING CO Ltd
•
Filing: 1957-08-20
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Granted: 1960-03-29
•
Expires: 1977-08-20
Abstract
No abstract record available.
Inventors
- 👤 Nuttall Thomas Cayton
- 👤 Bentley Lawrence Cranmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:45
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/90; G01N21/9018; G01N33/00; G01N33/0078; G01N33/0081
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |