US2999786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine glazed paper
Assignee: Thilmany Pulp and Paper Co
•
Filing: 1957-08-09
•
Granted: 1961-09-12
•
Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 Martin L Downs
- 👤 Ralph A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:10
CPC Classifications
D; D21; D21F; D21F11/00; D21F11/02; D21F11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN THE MANUFACTURE OF MACHINE GLAZED PAPER, THE STEPS OF PREPARING A BASE SHEET FROM CELLULOSIC PULP HAVING A FREENESS IN EXCESS OF 600, SUPERIMPOSING ON SAID BASE SHEET A LOW FREENESS CELLULOSIC PULP HAVING A FREENESS OF LESS THAN 400 AND MORE THAN 50, SAID LOW FREENESS OF COMPRISING AT LEAST 5 PERCENT AND NOT MORE THAN 15 PERCENT, BY WEIGHT, OF THE FINISHED SHEET, ON A DRY BASIS, AND THEREAFTER PRESSING THE SUPERIMPOSED LOW FREENESS PULP AGAINST A POLISHED DRYING SURFACE AT A PRESSURE IN EXCESS OF ABOUT 80 P.S.I. AND LESS THAN ABOUT 1500 P.S.I., AND DRYING SAID SHEET WHILE MAINTAINING SAID FREENESS SURFACE IN CONTACT WITH SAID POLISHED DRYING SURFACE TO PROVIDE A FINISHED MACHINE GLAZED SHEET.
Claim 2
Dependent Claim
121 words
IN THE MANUFACTURE OF MACHINE GLAZED PAPER, THE STEPS OF PREPARING A BASE SHEET FROM CELLULOSIC PULP HAVING A FREENESS IN EXCESS OF 600, SUPERIMPOSING ON SAID BASE SHEET A LOW FREENESS CELLULOSIC PULP HAVING A FREENESS OF LESS THAN 400 AND MORE THAN 50, SAID LOW FREENESS OF COMPRISING AT LEAST 5 PERCENT AND NOT MORE THAN 15 PERCENT, BY WEIGHT, OF THE FINISHED SHEET, ON A DRY BASIS, AND THEREAFTER PRESSING THE SUPERIMPOSED LOW FREENESS PULP AGAINST A POLISHED DRYING SURFACE AT A PRESSURE IN EXCESS OF ABOUT 80 P.S.I. AND LESS THAN ABOUT 1500 P.S.I., AND DRYING SAID SHEET WHILE MAINTAINING SAID FREENESS SURFACE IN CONTACT WITH SAID POLISHED DRYING SURFACE TO PROVIDE A FINISHED MACHINE GLAZED SHEET.
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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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |