US2928035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feedback servo systems
Assignee: Unisys Corp
•
Filing: 1957-10-30
•
Granted: 1960-03-08
•
Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Levinson Emanucl
- 👤 Joseph C Thom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/124; G05B; G05B5/00; G05B5/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2607851A
Cited
US2632872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |