Patent US2790730A successfully refreshed from Google Patents.
US2790730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making and finishing coated paperboard and the like
Assignee: Gardner Board and Carton Co
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Filing: 1954-07-12
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Granted: 1957-04-30
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Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Stanley W Trosset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:54
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/08; D21H25/12; D21H25/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A PROCESS OF SECURING A WATER FINISH ON A WEB OF PAPER OR PAPERBOARD COATED WITH A MINERAL-ADHESIVE MIXTURE IN WHICH THE MINERAL IS A FINELY DIVEDED INSOLUBLE SOLID AND THE ADHESIVE IS ORGANIC AND WATER SOLUBLE, WHICH PROCESS COMPRISES PASSING THE COATED WEB THROUGH A FINISHING STACK OF METALLIC CALENDER ROLLS AND, BY MEANS OF A WATER BOX ON SAID STACK APPLYING TO THE COATED SURFACE OF SAID WEB A WATER SOLUTION OF A NEUTRAL SALT OF A STRONG ACID AND A STRONG BASE IN A CONCENTRATION IN SAID WATER SOLUTION OF SUBSTANTIALLY 5 TO 20%, WHEREBY TO SOFTEN SAID MINERAL-ADHESIVE COATING TO PERMIT THE ATTAINMENT OF A WATER FINISH WHILE PREVENTING THE DEVELOPMENT OF TACKINESS IN SAID MINERAL-ADHESIVE COATING WHICH WOULD PRODUCE PICKING AND STICKING.
Claim 2
Dependent Claim
127 words
A PROCESS OF SECURING A WATER FINISH ON A WEB OF PAPER OR PAPERBOARD COATED WITH A MINERAL-ADHESIVE MIXTURE IN WHICH THE MINERAL IS A FINELY DIVEDED INSOLUBLE SOLID AND THE ADHESIVE IS ORGANIC AND WATER SOLUBLE, WHICH PROCESS COMPRISES PASSING THE COATED WEB THROUGH A FINISHING STACK OF METALLIC CALENDER ROLLS AND, BY MEANS OF A WATER BOX ON SAID STACK APPLYING TO THE COATED SURFACE OF SAID WEB A WATER SOLUTION OF A NEUTRAL SALT OF A STRONG ACID AND A STRONG BASE IN A CONCENTRATION IN SAID WATER SOLUTION OF SUBSTANTIALLY 5 TO 20%, WHEREBY TO SOFTEN SAID MINERAL-ADHESIVE COATING TO PERMIT THE ATTAINMENT OF A WATER FINISH WHILE PREVENTING THE DEVELOPMENT OF TACKINESS IN SAID MINERAL-ADHESIVE COATING WHICH WOULD PRODUCE PICKING AND STICKING.
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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |