US3261899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry process for making synthetic fiber paper
Assignee: Celanese Corp
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Filing: 1962-11-27
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Granted: 1966-07-19
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Expires: 1982-11-27
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Coates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:53
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A SUBSTANTIALLY DRY PROCESS FOR MAKING PAPER WHICH COMPRISE: (1) APPLYING FROM 5% TO 40% BY WEIGHT OF A PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF ESTERS OF POLYHYDRIC ALCOHOLS, ESTERS OF CARBOXYLIC ACIDS, ORGANIC ESTERS OF INORGANIC ACIDS, ALKOXY ALKYL ESTERS OF INORGANIC ACIDS, AND ESTERS OF ORGANIC POLYBASIC ACIDS TO OPENED STAPLE FIBERS COMPOSED OF AN ORGANIC ACID ESTER OF CELLULOSE HAVING A FIBER LENGTH EXCEEDING 1/2 INCH; (2) FORMING A MONWOVEN WEB COMPRISING SAID FIBERS HAVING THE PLASITICIZER THEREON; (3) CALENDERING SAID WEB AT A TEMPERATURE OF FROM 150*F. TO 375*F,; AND (4) REMOVING SAID WEB FROM THE CALENDER AS SYNTHETIC PAPER HAVING A POROSITY OF FROM 25% TO 85%.
Claim 2
Dependent Claim
113 words
A SUBSTANTIALLY DRY PROCESS FOR MAKING PAPER WHICH COMPRISE: (1) APPLYING FROM 5% TO 40% BY WEIGHT OF A PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF ESTERS OF POLYHYDRIC ALCOHOLS, ESTERS OF CARBOXYLIC ACIDS, ORGANIC ESTERS OF INORGANIC ACIDS, ALKOXY ALKYL ESTERS OF INORGANIC ACIDS, AND ESTERS OF ORGANIC POLYBASIC ACIDS TO OPENED STAPLE FIBERS COMPOSED OF AN ORGANIC ACID ESTER OF CELLULOSE HAVING A FIBER LENGTH EXCEEDING 1/2 INCH; (2) FORMING A MONWOVEN WEB COMPRISING SAID FIBERS HAVING THE PLASITICIZER THEREON; (3) CALENDERING SAID WEB AT A TEMPERATURE OF FROM 150*F. TO 375*F,; AND (4) REMOVING SAID WEB FROM THE CALENDER AS SYNTHETIC PAPER HAVING A POROSITY OF FROM 25% TO 85%.
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |