US3318652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical devices utilizing faraday rotation
Assignee: AT&T Inc
•
Filing: 1963-04-23
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Granted: 1967-05-09
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Expires: 1983-04-23
Abstract
No abstract record available.
Inventors
- 👤 Stuart B Berger
- 👤 Charles B Rubinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/0009; G02F1/0036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A LIGHT ROTATING DEVICE COMPRISING IN COMBINATION A LIGHT ROTATING MEDIUM CONSISTING ESSENTIALLY OF GLASS HAVING THE COMPOSITION REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
22 words
A LIGHT ROTATING DEVICE COMPRISING IN COMBINATION A LIGHT ROTATING MEDIUM CONSISTING ESSENTIALLY OF GLASS HAVING THE COMPOSITION REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |