US2938568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for and method of corrugating paper
Assignee: Arkell Safety Bag Co
•
Filing: 1956-11-27
•
Granted: 1960-05-31
•
Expires: 1976-11-27
Abstract
No abstract record available.
Inventors
- 👤 William H Cock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:58
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE20970E
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US793316A
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US1548783A
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US1716260A
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US2182720A
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US2285617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |