Patent US3159622A successfully refreshed from Google Patents.
Patent US2588988A successfully refreshed from Google Patents.
US2588988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Follow-up type servomotor
Assignee: MASON NEILAN REGULATOR Co
•
Filing: 1947-02-14
•
Granted: 1952-03-11
•
Expires: 1967-02-14
Abstract
No abstract record available.
Inventors
- 👤 John W Robins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:40
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F16; F16K; F16K31/00; F16K31/12; F16K31/126
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1261090A
Cited
US2107976A
Cited
US2264262A
Cited
US2298112A
Cited
US2382941A
Cited
US2408685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |