Patent US2843502A successfully refreshed from Google Patents.
US2843502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coating a fabric with polytetrafluoroethylene, the product thereof and the coating composition therefor
Assignee: EIDP Inc
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Filing: 1954-02-17
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Granted: 1958-07-15
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Expires: 1974-02-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert E Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:38
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; C; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; D06M13/00; D06M13/244; D06M13/248; D06M13/322; D06M13/402; D06M13/438; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/20; Y10T442/2475; Y10T442/273; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
A COATING COMPOSITION COMPRISING AN AQUEOUS SUSPENSION OF POLYTETRAFLUOROETHYLENE, 1% TO 10% OF A WATER-SOLUBLE PRIMARY WETTING AGENT AND .4% TO 10% OF AN ANCILLARY WETTING AGENT, SAID PERCENTAGES BEING BASED ON THE WEIGHT OF POLYTETRAFLUOROETHYLENE, SAID PRIMARY WETTING AGENT BEING A MEMBER OF THE GROUP CONSISTING OF (1) THE SODIUM SALT OF THE SULFURIC ACID ESTER OF MONOHYDRIC ALCOHOLS COMPRISING PREDOMINANTLY LAURYL ALCOHOL AND (2) OCTYL PHENYL POLYGLYCOL ETHER, AND SAID ANCILLARY WETTING AGENT BEING CHEMICALLY DIFFERENT THAN SAID PRIMARY WETTING AGENT AND HAVING THE FOLLOWING EMPRICAL FORMULA:
Claim 2
Dependent Claim
89 words
A COATING COMPOSITION COMPRISING AN AQUEOUS SUSPENSION OF POLYTETRAFLUOROETHYLENE, 1% TO 10% OF A WATER-SOLUBLE PRIMARY WETTING AGENT AND .4% TO 10% OF AN ANCILLARY WETTING AGENT, SAID PERCENTAGES BEING BASED ON THE WEIGHT OF POLYTETRAFLUOROETHYLENE, SAID PRIMARY WETTING AGENT BEING A MEMBER OF THE GROUP CONSISTING OF (1) THE SODIUM SALT OF THE SULFURIC ACID ESTER OF MONOHYDRIC ALCOHOLS COMPRISING PREDOMINANTLY LAURYL ALCOHOL AND (2) OCTYL PHENYL POLYGLYCOL ETHER, AND SAID ANCILLARY WETTING AGENT BEING CHEMICALLY DIFFERENT THAN SAID PRIMARY WETTING AGENT AND HAVING THE FOLLOWING EMPRICAL FORMULA:
Claim 3
Dependent Claim
33 words
THE PROCESS WHICH COMPRISES BRIDGING THE INTERSTICES OF A WOVEN FABRIC WITH THE COMPOSITION OF CLAIM 1 AND HEATING THE COATING TO AT LEAST 621*F., BUT BELOW THE DECOMPOSITION TEMPERATURE OF THE FABRIC.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |