Patent US3434241A successfully refreshed from Google Patents.
US3434241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for surface-finishing metalwork
Assignee: WILLIAM B GREENBERG
•
Filing: 1966-11-03
•
Granted: 1969-03-25
•
Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 Elmer H Greenberg
- 👤 William B Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:33
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/08; B24C3/10; B24C3/12; B24C3/02; B24C3/06; B24C3/062
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1867856A
Cited
US1829599A
Cited
US2200587A
Cited
US2479299A
Cited
US2621446A
Cited
US3055150A
Cited
US3103767A
Cited
US3237351A
Cited
US3192677A
Cited
US3138900A
Cited
US3283450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |