Patent US2799409A successfully refreshed from Google Patents.
US3138518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making striated paperbpoard
Assignee: Columbia Box Board Mills Inc
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Filing: 1961-07-13
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Granted: 1964-06-23
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Expires: 1981-07-13
Abstract
No abstract record available.
Inventors
- 👤 Henry M Greenhouse
- 👤 Arthur J Dimick
- 👤 Francis M Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:16
CPC Classifications
D; D21; D21F; D21F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A METHOD OF FMAKING PATTERENED PAPERBOARD ON A CYLINDER MACHINE HAVING A LAST FIBER-APPLYING CYLINDER VAT, THE STEPS OF CONTROLLING THE VAT CONSISTENCY OF STOCK IN THE LAST VAT TO BETWEEN 0.10% AND 0.25% BY WEIGHT OF FIBERS IN WATER, CONTROLLING THE FREENESS OF STOCK TO A CANADIAN STANDARD FREENESS OF BETWEEN 200 CC. AND 490 CC. AND CONTROLLING THE HYDROSTATIC MOLD HEAD TO PROVIDE A HEAD OF BETWEEN 1 1/2 INCHES AND 3 1/2 INCHES IN SAID LAST CYLINDER VAT.
Claim 2
Dependent Claim
82 words
IN A METHOD OF FMAKING PATTERENED PAPERBOARD ON A CYLINDER MACHINE HAVING A LAST FIBER-APPLYING CYLINDER VAT, THE STEPS OF CONTROLLING THE VAT CONSISTENCY OF STOCK IN THE LAST VAT TO BETWEEN 0.10% AND 0.25% BY WEIGHT OF FIBERS IN WATER, CONTROLLING THE FREENESS OF STOCK TO A CANADIAN STANDARD FREENESS OF BETWEEN 200 CC. AND 490 CC. AND CONTROLLING THE HYDROSTATIC MOLD HEAD TO PROVIDE A HEAD OF BETWEEN 1 1/2 INCHES AND 3 1/2 INCHES IN SAID LAST CYLINDER VAT.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |