US2552296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant speed apparatus
Assignee: Bristol Co
•
Filing: 1944-10-27
•
Granted: 1951-05-08
•
Expires: 1964-10-27
Abstract
No abstract record available.
Inventors
- 👤 John L Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
H; H02; H02K; H02K11/00; H02K11/20; H02K11/21; H02K11/23; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924; Y10S388/925
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US291636A
Cited
US400971A
Cited
US478475A
Cited
US588692A
Cited
US771269A
Cited
US1868616A
Cited
US1791149A
Cited
GB440309A
Cited
US2032444A
Cited
US2250983A
Cited
US2250984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |