US2748330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional band adjusting electrical control apparatus
Assignee: Evershed and Vignoles Ltd
•
Filing: 1952-03-28
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Granted: 1956-05-29
•
Expires: 1972-03-28
Abstract
No abstract record available.
Inventors
- 👤 Bergen Stephen Archbold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:55
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7313; Y10T137/7323; Y10T137/7358; Y10T137/7368
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993527A
Cited
US2282726A
Cited
US2483450A
Cited
US2495844A
Cited
US2556065A
Cited
US2525967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |