Patent US3469506A successfully refreshed from Google Patents.
US3469506A
Expired / Lapsed
US
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Bottom creasing and closing apparatus in machines for making open,crossed-bottom sacks
Assignee: Windmoeller and Hoelscher KG
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Filing: 1967-03-21
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Granted: 1969-09-30
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Expires: 1987-03-21
Abstract
No abstract record available.
Inventors
- 👤 Willi Stork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:41
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/26; B31B70/52; B31B2150/00; B31B2150/001; B31B2150/0012; B31B2160/00; B31B2160/10; B31B2160/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1847998A
Cited
US2125306A
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US2163278A
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US3196591A
Cited
US3186313A
Cited
FR1377558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |