Patent US2725796A successfully refreshed from Google Patents.
US2725796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of printing paper
Assignee: Paper Patents Co
•
Filing: 1950-10-26
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Granted: 1955-12-06
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Expires: 1970-10-26
Abstract
No abstract record available.
Inventors
- 👤 James H Dinius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:52
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/67; D21H17/675; D21H17/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
AN INTEGRATED PROCESS FOR THE MANUFACTURE OF COATED PAPER, WHICH COMPRISES MAKING UP A FURNISH FROM PAPERMAKING MATERIALS WHICH INCLUDE A SUPPLY OF UNMERCHANTABLE COATED PAPER MADE BY THE PROCESS AND HAVING A COATING CONTAINING CALCIUM CARBONATE, ADDING TO THE FURNISH A SUPPLY OF PHOSPHORIC ACID SO AS TO FORM A PHOSPHATE PIGMENT IN THE FURNISH, FORMING A WEB FROM SAID PHOSPHATE-CONTAINING FURNISH, AND COATING SAID WEB WITH A MIXTURE CONTAINING A SUBSTANTIAL PRECENTAGE OF CALCIUM CARBONATE, THE AMOUNT OF CARBONATE IN THE FURNISH BEING AT LEAST SUFICIENT TO REACT WITH ALL OF THE ADDED PHOSPHORIC ACID.
Claim 2
Dependent Claim
97 words
AN INTEGRATED PROCESS FOR THE MANUFACTURE OF COATED PAPER, WHICH COMPRISES MAKING UP A FURNISH FROM PAPERMAKING MATERIALS WHICH INCLUDE A SUPPLY OF UNMERCHANTABLE COATED PAPER MADE BY THE PROCESS AND HAVING A COATING CONTAINING CALCIUM CARBONATE, ADDING TO THE FURNISH A SUPPLY OF PHOSPHORIC ACID SO AS TO FORM A PHOSPHATE PIGMENT IN THE FURNISH, FORMING A WEB FROM SAID PHOSPHATE-CONTAINING FURNISH, AND COATING SAID WEB WITH A MIXTURE CONTAINING A SUBSTANTIAL PRECENTAGE OF CALCIUM CARBONATE, THE AMOUNT OF CARBONATE IN THE FURNISH BEING AT LEAST SUFICIENT TO REACT WITH ALL OF THE ADDED PHOSPHORIC ACID.
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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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |