US2902899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmological hand instrument for the examination of the retina of the eye
Assignee: Oculus Optikgeraete GmbH
•
Filing: 1955-08-25
•
Granted: 1959-09-08
•
Expires: 1975-08-25
Abstract
No abstract record available.
Inventors
- 👤 Cuppers Curt
- 👤 Kirchhubel Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:42
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/12; A61B3/1208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1236722A
Cited
US1774832A
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US1889456A
Cited
GB333925A
Cited
DE624095C
Cited
US1943509A
Cited
GB511555A
Cited
GB676843A
Cited
DE840169C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |