US2519760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens system for gastroscopes or the like
Assignee: American Cystoscope Makers Inc
•
Filing: 1949-02-16
•
Granted: 1950-08-22
•
Expires: 1969-02-16
Abstract
No abstract record available.
Inventors
- 👤 John H Hett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:08
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/2407
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2325831A
Cited
US849344A
Cited
US940894A
Cited
US984929A
Cited
US964703A
Cited
US1741575A
Cited
US1643719A
Cited
US1706930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |