US2967116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paperboard and method of manufacture
Assignee: Control Pak Corp
•
Filing: 1957-08-20
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Granted: 1961-01-03
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Expires: 1977-08-20
Abstract
No abstract record available.
Inventors
- 👤 William K Hollinger
- 👤 Robert H Hollinger
- 👤 Alvis R Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:13
CPC Classifications
B; B65; B65D; B65D65/00; B65D65/38; B65D65/40; B65D65/403; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/60; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
119 words
A METHOD OF INCREASING THE STRENGTH OF A CORRUGATED PAPER BLANK COMPRISING IMMERSING SAID BLANK IN A COMPOSITION CONTAINING FROM 70 TO 95 PARTS BY WEIGHT OF MINERAL WAX AND FROM 5 TO 30 PARTS BY WEIGHT OF A PETROLEUM POLYMER RESIN HAVING AN A.S.T.M. RING AND BALL SOFTENING POINT ABOVE 158*F. FOR A PERIOD SUFFICIENT TO INCORPORATE AT LEAST 26% OF SAID COMPOSITION IN SAID BLANK AT A TEMPERATURE OF FROM 180* TO 250*F., REMOVING SAID BLANK FROM SAID COMPOSITION AND SUBJECTING SAID BLANK TO AN ELEVATED TEMPERATURE OF FROM 250* TO 350*F. TO FACILITATE REMOVAL OF EXCESSIVE AMOUNTS OF SAID COMPOSITION UNTIL SAID COMPOSITION REPRESENTS BETWEEN 26% AND 37% OF THE TOTAL WEIGHT OF THE IMPREGNATED BLANK.
References Cited (Backward Citations)
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US2705205A
Cited
US2758100A
Cited
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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) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |