Patent US2816562A successfully refreshed from Google Patents.
US2816562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable proportionating spring assembly and control system
Assignee: Bristol Co
•
Filing: 1954-01-05
•
Granted: 1957-12-17
•
Expires: 1974-01-05
Abstract
No abstract record available.
Inventors
- 👤 Ernest F Dyson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:03
CPC Classifications
G; G05; G05G; G05G23/00; G05B; G05B6/00; G05B6/05; G05D; G05D23/00; G05D23/185; G05G2700/00; G05G2700/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2310298A
Cited
US2298112A
Cited
US2406181A
Cited
GB604468A
Cited
US2631570A
Cited
US2652066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |