Patent US2956672A successfully refreshed from Google Patents.
US2956672A
Expired / Lapsed
US
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Packaging
Assignee: WR Grace and Co
•
Filing: 1958-12-19
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Granted: 1960-10-18
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Expires: 1978-12-19
Abstract
No abstract record available.
Inventors
- 👤 Wylie C Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:32
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/02; B65D81/05; B65D81/07; B65D75/00; B65D75/40; B65D75/42; B65D75/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB237322A
Cited
US2501570A
Cited
US2700518A
Cited
US2865765A
Cited
US2877500A
Cited
US2837208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |