US3402068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving wet strength properties of paperboard
Assignee: OI Glass Inc
•
Filing: 1964-11-12
•
Granted: 1968-09-17
•
Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Colbert W Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:12
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/60; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; D21H17/49; D21H17/50; D21H17/51; D21H23/00; D21H23/02; D21H23/22; D21H23/66; D21H23/68
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |