US2716074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating paper with crystalline sarans
Assignee: Dow Chemical Co
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Filing: 1951-08-20
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Granted: 1955-08-23
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Expires: 1971-08-20
Abstract
No abstract record available.
Inventors
- 👤 William F Mick
- 👤 Oliver B Amley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:13
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/26; D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/46; D21H23/48; D21H5/00; D21H5/0005; D21H5/0042; D21H5/0045; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/266
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD WHICH COMPRISES CONTINUOUSLY MELTING A NORMALLY CRYSTALLINE SARAN, SUPPLYING IT CONTINUOUSLY AT THE RATE OF WHICH IT IS MELTED TO PRESSURE ZONE, SIMULTANEOUSLY FEEDING A STRIP OF PAPER TO SAID PRESSURE ZONE, BRINGING THE PAPER AND THE MOLTEN POLYMER CONTINUOUSLY INTO CONTACT ACROSSS THE FACE OF THE PAPER SHEET, PRESSING THE POLYMER TO A UNIFORM THICKNESS ON THE SHEETS, TAKING THE SO-COATED PAPER AWAY FROM THE PRESSURE ZONE CONTINUOUSLY AND AT SUCH A RATE THAT THE POLYMER IS USED IN COATING AT SUBSTANTIALLY THE SAME RATE AS IT IS MELTED AND SUPPLIED FOR THE PURPOSE, PROMPTLY WETTING THOROUGHLY THE UNCOATED SIDE OF THE PAPER WITH WATER WHILE THE POLYMER ON THE COATED SIDE IS STILL AMORPHOUS, AND SUBJECTING THE SO-TREATED SHEET TO A TEMPERATURE OF AT LEAST 55* C. AT WHICH THE POLYMER CRYSTALLIZES RAPIDLY, FOR A TIME SUFFICIENT TO CRYSTALLIZE THE POLYMER.
Claim 2
Independent Claim
145 words
THE METHOD WHICH COMPRISES CONTINUOUSLY MELTING A NORMALLY CRYSTALLINE SARAN, SUPPLYING IT CONTINUOUSLY AT THE RATE OF WHICH IT IS MELTED TO PRESSURE ZONE, SIMULTANEOUSLY FEEDING A STRIP OF PAPER TO SAID PRESSURE ZONE, BRINGING THE PAPER AND THE MOLTEN POLYMER CONTINUOUSLY INTO CONTACT ACROSSS THE FACE OF THE PAPER SHEET, PRESSING THE POLYMER TO A UNIFORM THICKNESS ON THE SHEETS, TAKING THE SO-COATED PAPER AWAY FROM THE PRESSURE ZONE CONTINUOUSLY AND AT SUCH A RATE THAT THE POLYMER IS USED IN COATING AT SUBSTANTIALLY THE SAME RATE AS IT IS MELTED AND SUPPLIED FOR THE PURPOSE, PROMPTLY WETTING THOROUGHLY THE UNCOATED SIDE OF THE PAPER WITH WATER WHILE THE POLYMER ON THE COATED SIDE IS STILL AMORPHOUS, AND SUBJECTING THE SO-TREATED SHEET TO A TEMPERATURE OF AT LEAST 55* C. AT WHICH THE POLYMER CRYSTALLIZES RAPIDLY, FOR A TIME SUFFICIENT TO CRYSTALLIZE THE POLYMER.
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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) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |