US2668481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for manufacturing valve bags
Assignee: Arkell and Smiths
•
Filing: 1948-10-29
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Granted: 1954-02-09
•
Expires: 1968-10-29
Abstract
No abstract record available.
Inventors
- 👤 Paul C Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:34
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/84; B31B70/85; B31B2150/00; B31B2160/00; B31B2160/10; B31B2160/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2044476A
Cited
US2096788A
Cited
US2325042A
Cited
US2415862A
Cited
US2559873A
Cited
US2387274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |