US2456296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual inspection projection apparatus
Assignee: Individual
•
Filing: 1946-01-31
•
Granted: 1948-12-14
•
Expires: 1966-01-31
Abstract
No abstract record available.
Inventors
- 👤 Rex D Mcdill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:50
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1075789A
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US1974654A
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US1199942A
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US1282743A
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US1900925A
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US1848253A
Cited
US1951054A
Cited
US2016034A
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US2179799A
Cited
US2155248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |