US2764339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-ply valve sacks
Assignee: Paper Sacks Ltd
•
Filing: 1950-07-17
•
Granted: 1956-09-25
•
Expires: 1970-07-17
Abstract
No abstract record available.
Inventors
- 👤 Owens William Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:02
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14; B65D31/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB343447A
Cited
US1935380A
Cited
US2013086A
Cited
US2055030A
Cited
US2176499A
Cited
US2246911A
Cited
US2360720A
Cited
US2460885A
Cited
US2488038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |