Patent US2987858A successfully refreshed from Google Patents.
US2987858A
Expired / Lapsed
US
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Method of closing bag tube ends
Assignee: Union Bag and Paper Corp
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Filing: 1959-04-30
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Granted: 1961-06-13
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Expires: 1979-04-30
Abstract
No abstract record available.
Inventors
- 👤 William C Kerker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:07
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65B; B65B1/00; B65B1/20; B65B1/24; B65B51/00; B65B51/04; B65B51/06; B65B51/065; B65B7/00; B65B7/02; B65B7/06; B65B7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2015199A
Cited
US2356472A
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US2409621A
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US2404337A
Cited
US2571103A
Cited
US2729928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |