US2719236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical apparatus for determining surface areas
Assignee: United States Steel Corp
•
Filing: 1951-05-16
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Granted: 1955-09-27
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Expires: 1971-05-16
Abstract
No abstract record available.
Inventors
- 👤 John E Soltis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:05
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/02; G01B11/06; G01B9/00; G01B9/08; G03; G03D; G03D15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1963128A
Cited
US2098326A
Cited
US2179000A
Cited
US2149958A
Cited
US2346031A
Cited
US2578882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |