Patent US2998911A successfully refreshed from Google Patents.
US2998911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag opening device
Assignee: Union Bag and Paper Corp
•
Filing: 1958-12-01
•
Granted: 1961-09-05
•
Expires: 1978-12-01
Abstract
No abstract record available.
Inventors
- 👤 William W Hahn
- 👤 Ray H Brodt
- 👤 George J Kilmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:54
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/14; B65D31/142; B65D75/00; B65D75/52; B65D75/58; B65D75/66; B65D75/68
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |