Patent US3446121A successfully refreshed from Google Patents.
US3446121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for pulling open the ends of tube sections of plastic material sheeting
Assignee: Windmoeller and Hoelscher KG
•
Filing: 1967-05-15
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Granted: 1969-05-27
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Fritz Achelpohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:13
CPC Classifications
B; B65; B65B; B65B43/00; B65B43/26; B65B43/30; B31; B31B; B31B2150/00; B31B2150/001; B31B2150/0014; B31B50/00; B31B50/74; B31B50/76; B31B50/80; B31B70/00; B31B70/003; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2224656A
Cited
US3006256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |