US2779301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming barrel seams
Assignee: Grotnes Machine Works Inc
•
Filing: 1951-03-10
•
Granted: 1957-01-29
•
Expires: 1971-03-10
Abstract
No abstract record available.
Inventors
- 👤 Carl C Grotnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:00
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/30; B21D51/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE290474C
Cited
US1711336A
Cited
US827163A
Cited
US1096937A
Cited
US1275867A
Cited
US1811405A
Cited
US2040785A
Cited
DE652760C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |