Patent US2068499A successfully refreshed from Google Patents.
US2584583A
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US
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Means for optically determining relative thickness of surface coatings on glass articles and the like
Assignee: Emhart Manufacturing Co
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Filing: 1947-01-18
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Granted: 1952-02-05
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Expires: 1967-01-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur M Hillery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:42
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/55; G01B; G01B11/00; G01B11/30; G01B11/303
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1571066A
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US1939088A
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US2127477A
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US2170435A
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US2215211A
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US2338234A
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US2406318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |