Patent US1967548A successfully refreshed from Google Patents.
US1967548A
Expired / Lapsed
US
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Arrangement for producing multiple total reflections
Assignee: Individual
•
Filing: 1933-06-16
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Granted: 1934-07-24
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Expires: 1953-06-16
Abstract
No abstract record available.
Inventors
- 👤 Bartels Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:29
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0013; G02B6/0023; G02B6/0031; F; F21; F21V; F21V7/00; G02B6/24; G02B6/42; G02B6/4298; G02B6/0026; G02B6/0066; G02B6/007
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) | 1937-07-23 | 1938-01-22 | 1938-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-23 | 1942-01-22 | 1942-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-23 | 1946-01-22 | 1946-07-24 | $7700.00 | Window Closed / Lapsed |