Patent US1950445A successfully refreshed from Google Patents.
Patent US3562097A successfully refreshed from Google Patents.
US3562097A
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US
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Multi-ply cylinder paper of reduced machine-to-cross direction tensile strength ratio
Assignee: United States Gypsum Co
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Filing: 1967-01-30
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Granted: 1971-02-09
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Expires: 1987-01-30
Abstract
Abstract AN UNCREPED, MULTI-PLY CYLINDER MACHINE PAPER SHEET AND PROCESS OF MAKING IT HAVING A RATIO OF MACHINE-TOCROSS DIRECTION DRY TENSILE STRENGTH BETWEEN ABOUT 3.35:1 AND 4.1:1 SAID SHEET CONTAINING 7-20% MINERAL-FIBERS WITH NO MORE THAN 43% MINERAL FIBERS IN ANY ONE PLY.
Inventors
- 👤 Romulus S Von Hazmburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:44
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043; C; C04; C04B; C04B28/00; C04B28/14; C04B2111/00; C04B2111/00474; C04B2111/00612; C04B2111/0062; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31634
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |