US2920979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper sized with fluorocarbon agents on one side and coated on the opposite side with thermoplastic materials
Assignee: 3M Co
•
Filing: 1956-01-13
•
Granted: 1960-01-12
•
Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Lawrence J Hessburg
- 👤 Gayle L Rengel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:08
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/06; D21H17/11; D21H19/00; D21H19/10; D21H19/14; D21H19/18; D21H19/80; D21H19/84; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
AS A NEW ARTICLE OF MANUFACTURE, AN INITIALLY POROUS UNSIZED PAPER THAT HAS BEEN FIBER SIZED ON ONE SIDE ONLY WITH AN OLEOPHOBIC FLUOROCARBON SIZING AGENT IN AMOUNT WHICH DOES NOT APPRECIABLY CHANGE THE POROSITY OF THE PAPER AND WHICH RENDERS THE TREATED SIDE OF THE PAPER REPELLENT TO GLYCERINE BUT NOT THE UNTREATED SIDE, AND THAT HAS BEEN SUBSEQUENTLY COATED UPON THE UNTREATED SIDE WITH A COATING OF A WATER-INSOLUBLE THERMOPLASTIC COATING COMPOSITION APPLIED FROM A HOT-MELT AND WHICH DOES NOT OBJECTIONABLY STRIKE THROUGH THE PAPER AS IT WOULD HAVE IF THE PAPER HAD NOT BEEN SIZED.
Claim 2
Dependent Claim
98 words
AS A NEW ARTICLE OF MANUFACTURE, AN INITIALLY POROUS UNSIZED PAPER THAT HAS BEEN FIBER SIZED ON ONE SIDE ONLY WITH AN OLEOPHOBIC FLUOROCARBON SIZING AGENT IN AMOUNT WHICH DOES NOT APPRECIABLY CHANGE THE POROSITY OF THE PAPER AND WHICH RENDERS THE TREATED SIDE OF THE PAPER REPELLENT TO GLYCERINE BUT NOT THE UNTREATED SIDE, AND THAT HAS BEEN SUBSEQUENTLY COATED UPON THE UNTREATED SIDE WITH A COATING OF A WATER-INSOLUBLE THERMOPLASTIC COATING COMPOSITION APPLIED FROM A HOT-MELT AND WHICH DOES NOT OBJECTIONABLY STRIKE THROUGH THE PAPER AS IT WOULD HAVE IF THE PAPER HAD NOT BEEN SIZED.
References Cited (Backward Citations)
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US2777781A
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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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |