US2469388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple lens hand type ophthalmoscope
Assignee: American Cystoscope Makers Inc
•
Filing: 1946-04-24
•
Granted: 1949-05-10
•
Expires: 1966-04-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:09
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/12; A61B3/1208
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE132432C
Cited
US254139A
Cited
US1507447A
Cited
US1631329A
Cited
US1889456A
Cited
US1795691A
Cited
GB331862A
Cited
US1893327A
Cited
US2269962A
Cited
US2370514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |