US2635854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool rotator for reciprocating hammers
Assignee: Syntron Co
•
Filing: 1950-09-12
•
Granted: 1953-04-21
•
Expires: 1970-09-12
Abstract
No abstract record available.
Inventors
- 👤 Archer W Richards
- 👤 Ervin J Osterhus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
E; E21; E21B; E21B6/00; E21B6/06; E21B1/00; E21B1/12; E21B1/22; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1529; Y10T74/18; Y10T74/1856; Y10T74/21; Y10T74/2133
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |