US2748474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined scribing and eye-protecting optical system
Assignee: Individual
•
Filing: 1954-08-27
•
Granted: 1956-06-05
•
Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
- 👤 Harry C Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:50
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US416003A
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US478787A
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US2178755A
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US2245116A
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US2362992A
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US2394452A
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US2455972A
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US2497418A
Cited
US2426480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |