Patent US2944200A successfully refreshed from Google Patents.
US2944200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferroelectric devices
Assignee: RCA Corp
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Filing: 1956-08-30
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Granted: 1960-07-05
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Expires: 1976-08-30
Abstract
No abstract record available.
Inventors
- 👤 Allen L Solomon
- 👤 George J Goldsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:05
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A FERROELECTRIC DEVICE COMPRISING A CRYSTAL OF A MATERIAL CRYSTALLOGRAPHICALLY ISOMORPHIC WITH THIOUREA AND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
24 words
A FERROELECTRIC DEVICE COMPRISING A CRYSTAL OF A MATERIAL CRYSTALLOGRAPHICALLY ISOMORPHIC WITH THIOUREA AND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING 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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |