Patent US2596264A successfully refreshed from Google Patents.
US2596264A
Expired / Lapsed
US
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Instrument for measuring pupillary distances
Assignee: Individual
•
Filing: 1946-06-04
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Granted: 1952-05-13
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Expires: 1966-06-04
Abstract
No abstract record available.
Inventors
- 👤 Albert C Macbeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:38
CPC Classifications
G; G02; G02C; G02C13/00; G02C13/003; G02C13/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US339676A
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US437030A
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US505496A
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US638727A
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US716516A
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US1487011A
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US1935175A
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US2197139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |