US2156015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for punching metal sheets
Assignee: Continental Can Co Inc
•
Filing: 1937-04-10
•
Granted: 1939-04-25
•
Expires: 1957-04-10
Abstract
No abstract record available.
Inventors
- 👤 George J Greiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:28
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/06; B21D28/08; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0505; Y10T83/748; Y10T83/7593; Y10T83/764; Y10T83/7667; Y10T83/7673; Y10T83/869; Y10T83/872
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-04-24 | 1942-10-24 | 1943-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-24 | 1946-10-24 | 1947-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-24 | 1950-10-24 | 1951-04-25 | $7700.00 | Window Closed / Lapsed |