US2835162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of examining eyes
Assignee: Individual
•
Filing: 1954-07-12
•
Granted: 1958-05-20
•
Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 David O Harrington
- 👤 Flocks Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:43
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/024
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1004503A
Cited
US1412902A
Cited
US1880028A
Cited
US1981587A
Cited
US1903502A
Cited
US2430232A
Cited
US2406596A
Cited
US2564794A
Cited
US2551683A
Cited
US2744441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |