US1892162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic three-lens objective
Assignee: Carl Zeiss SMT GmbH
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Filing: 1931-05-12
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Granted: 1932-12-27
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Expires: 1951-05-12
Abstract
No abstract record available.
Inventors
- 👤 Richter Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:43
CPC Classifications
G; G02; G02B; G02B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-12-27 | 1936-06-27 | 1936-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-12-27 | 1940-06-27 | 1940-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-12-27 | 1944-06-27 | 1944-12-27 | $7700.00 | Window Closed / Lapsed |