US2949770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus primarily for testing opening force and flap score stiffness characteristics of cartons
Assignee: Packaging Corp of America
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Filing: 1958-02-14
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Granted: 1960-08-23
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Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 James M Kernan
- 👤 Russell L Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:16
CPC Classifications
G; G01; G01M; G01M99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |