Patent US2169155A successfully refreshed from Google Patents.
Patent US2539902A successfully refreshed from Google Patents.
US2539902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hold-down guard mechanism for trimming presses
Assignee: H O CANFIELD CO
•
Filing: 1948-01-24
•
Granted: 1951-01-30
•
Expires: 1968-01-24
Abstract
No abstract record available.
Inventors
- 👤 John D Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:30
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/003; B26D7/00; B26D7/01; Y; Y10; Y10T; Y10T83/00; Y10T83/566; Y10T83/5669; Y10T83/5724; Y10T83/606; Y10T83/869; Y10T83/8765; Y10T83/8768
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US618065A
Cited
US1551447A
Cited
US1684296A
Cited
US779427A
Cited
US915438A
Cited
US1179477A
Cited
US2236730A
Cited
US2315151A
Cited
US2354291A
Cited
US2348566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |