Patent US3297878A successfully refreshed from Google Patents.
US3297878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive bistable element for use in information storage
Assignee: GTE Sylvania Inc
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Filing: 1956-11-28
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Granted: 1967-01-10
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Expires: 1976-11-28
Abstract
No abstract record available.
Inventors
- 👤 Egon E Loebner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:59
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN OPTO-ELECTRONIC BI-STABLE DEVICE COMPRISING THE COMBINATION OF AN ELECTRICALLY SERIES COUPLED VOLTAGE SOURCE, A LIGHT SENSITIVE IMPEDANCE MEANS AND AN ENERGIZABLE LIGHT PRODUCING MEANS, SAID LIGHT SENSITIVE MEANS AND SAID LIGHT PRODUCING MEANS BEING LIGHT COUPLED AND HAVING PARAMETERS PROVIDING A STABLE OFF CONDITION AND A
Claim 2
Dependent Claim
47 words
AN OPTO-ELECTRONIC BI-STABLE DEVICE COMPRISING THE COMBINATION OF AN ELECTRICALLY SERIES COUPLED VOLTAGE SOURCE, A LIGHT SENSITIVE IMPEDANCE MEANS AND AN ENERGIZABLE LIGHT PRODUCING MEANS, SAID LIGHT SENSITIVE MEANS AND SAID LIGHT PRODUCING MEANS BEING LIGHT COUPLED AND HAVING PARAMETERS PROVIDING A STABLE OFF CONDITION AND A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |