Patent US3389530A successfully refreshed from Google Patents.
US3389530A
Expired / Lapsed
US
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Method and apparatus for heat shrinking packaging film
Assignee: WR Grace and Co
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Filing: 1964-02-10
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Granted: 1968-06-25
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Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 Yates Ronald Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:48
CPC Classifications
B; B65; B65B; B65B53/00; B65B53/02; B65B53/06; B65B53/063
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3156812A
Cited
US3222800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |