US2821111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anamorphotic optical systems
Assignee: Taylor Taylor and Hobson Ltd
•
Filing: 1955-09-22
•
Granted: 1958-01-28
•
Expires: 1975-09-22
Abstract
No abstract record available.
Inventors
- 👤 Coleman Kenneth Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:29
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/08; G02B13/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1647631A
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GB189808512A
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US1931992A
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GB338962A
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US1905442A
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US2023217A
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US2048284A
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US2088660A
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US2375634A
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FR1091814A
Cited
FR1101419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |