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Patent US2619872A successfully refreshed from Google Patents.
US2619872A
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Optometric measuring device
Assignee: Individual
•
Filing: 1949-02-11
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Granted: 1952-12-02
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Expires: 1969-02-11
Abstract
No abstract record available.
Inventors
- 👤 Carl F Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:36
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B5/00; A61B5/16; A61B5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191515708A
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US1821626A
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US1946925A
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US2063015A
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US2313204A
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US2349457A
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US2363643A
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US2358316A
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GB614929A
Cited
US2441160A
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US2475366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |