US2533371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holder for microobjectives
Assignee: Ernst Leitz Wetzlar GmbH
•
Filing: 1948-10-23
•
Granted: 1950-12-12
•
Expires: 1968-10-23
Abstract
No abstract record available.
Inventors
- 👤 Heine Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:45
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US46511A
Cited
US198914A
Cited
US1476717A
Cited
US1662339A
Cited
US1889794A
Cited
US2042815A
Cited
US2006464A
Cited
US2427689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |