US3405270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal flaw detection using collimated beams
Assignee: AT&T Inc
•
Filing: 1965-08-06
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Granted: 1968-10-08
•
Expires: 1985-08-06
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:58
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2318667A
Cited
US2750512A
Cited
US2677106A
Cited
US2755702A
Cited
US3206603A
Cited
US3328000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |