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US2722862A
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Angular discriminating optical device
Assignee: Individual
•
Filing: 1949-09-12
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Granted: 1955-11-08
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Expires: 1969-09-12
Abstract
No abstract record available.
Inventors
- 👤 Otto G Schwede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:30
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/14; G02C7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE297989C
Cited
US1719154A
Cited
GB189730925A
Cited
US1458635A
Cited
GB429340A
Cited
US2026675A
Cited
GB458509A
Cited
US2211238A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |