US2567745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection lens barrel for schmidt lens system
Assignee: Individual
•
Filing: 1950-01-17
•
Granted: 1951-09-11
•
Expires: 1970-01-17
Abstract
No abstract record available.
Inventors
- 👤 Trad Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:44
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2273801A
Cited
US2295779A
Cited
US2455476A
Cited
US2424513A
Cited
US2467185A
Cited
US2466331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |