US2867784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion testing device
Assignee: AMERICAN INSTR CO Inc
•
Filing: 1953-10-07
•
Granted: 1959-01-06
•
Expires: 1973-10-07
Abstract
No abstract record available.
Inventors
- 👤 Justin J Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:58
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1989037A
Cited
US1925904A
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US2064772A
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US2407916A
Cited
US2432811A
Cited
US2447911A
Cited
US2625585A
Cited
US2665333A
Cited
US2717984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |