US1618291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining the field of vision
Assignee: Carl Zeiss SMT GmbH
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Filing: 1926-03-13
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Granted: 1927-02-22
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Expires: 1946-03-13
Abstract
No abstract record available.
Inventors
- 👤 Maggiore Luigi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:42
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/024
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) | 1930-02-21 | 1930-08-23 | 1931-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1934-02-21 | 1934-08-23 | 1935-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1938-02-21 | 1938-08-23 | 1939-02-22 | $7700.00 | Window Closed / Lapsed |