Patent US3621637A successfully refreshed from Google Patents.
US3621637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming closures
Assignee: WR Grace and Co
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Filing: 1970-06-16
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Granted: 1971-11-23
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Expires: 1990-06-16
Abstract
Abstract AN APPARATUS FOR FORMING COVERS ON CONTAINERS COMPRISING VERTICALLY MOVABLE SHIELDING HEADS TO HOLD A HEAT SHRINKABLE COVERING FILM THEREON AND MEANS TO ROTATE THE SHIELD AND CONTAINER WHILE HEAT IS APPLIED TO SHRINK THE EXPOSED EDGES OF THE FILM AGAINST THE SIDE OF THE CONTAINER.
Inventors
- 👤 Martin M Sternau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:15
CPC Classifications
B; B65; B65B; B65B7/00; B65B7/16; B65B7/28; B65B7/2842; B65B7/2885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |