Patent US2581806A successfully refreshed from Google Patents.
US2581806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply means for percussor apparatus
Assignee: Individual
•
Filing: 1948-03-05
•
Granted: 1952-01-08
•
Expires: 1968-03-05
Abstract
No abstract record available.
Inventors
- 👤 Robert C Mcshirley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:52
CPC Classifications
A; A61; A61H; A61H23/00; A61H23/02; A61H23/0218; H; H02; H02P; H02P25/00; H02P25/16; H02P25/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2132264A
Cited
US820753A
Cited
US1259396A
Cited
US1327466A
Cited
US1772650A
Cited
US1680086A
Cited
US1657765A
Cited
US1879675A
Cited
US2054590A
Cited
US2180189A
Cited
US2154427A
Cited
US2454494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |