US3480198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag opening device
Assignee: Dow Chemical Co
•
Filing: 1967-11-03
•
Granted: 1969-11-25
•
Expires: 1987-11-03
Abstract
No abstract record available.
Inventors
- 👤 John P Repko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:44
CPC Classifications
B; B65; B65D; B65D75/00; B65D75/52; B65D75/58; B65D75/5805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2139039A
Cited
US2635788A
Cited
US3033257A
Cited
US3045891A
Cited
US3140815A
Cited
US3186626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |