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US3153229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital actuator and direct digital transducer employing same
Assignee: Individual
•
Filing: 1963-05-13
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Granted: 1964-10-13
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 Charles E Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A DIGITAL ACTUATOR COMPRISING: A MOVABLE MEMBER OF A MATERIAL WHICH CHANGES IN PHYSICAL DIMENSION WHEN SUBJECTED TO AN ELECTRICAL FIELD; AND A PLURALITY OF MEANS FOR APPLYING ELECTRICAL FIELDS TO SAID MEMBER, SAID MEANS BEING SEPARATELY ENERGIZABLE TO APPLY SAID FIELDS IN INCREMENTS TO PRODUCE INCREMENTAL MOVEMENT OF SAID MEMBER.
Claim 2
Dependent Claim
51 words
A DIGITAL ACTUATOR COMPRISING: A MOVABLE MEMBER OF A MATERIAL WHICH CHANGES IN PHYSICAL DIMENSION WHEN SUBJECTED TO AN ELECTRICAL FIELD; AND A PLURALITY OF MEANS FOR APPLYING ELECTRICAL FIELDS TO SAID MEMBER, SAID MEANS BEING SEPARATELY ENERGIZABLE TO APPLY SAID FIELDS IN INCREMENTS TO PRODUCE INCREMENTAL MOVEMENT OF SAID MEMBER.
References Cited (Backward Citations)
US2995736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |