US2539329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coating an inorganic fabric with polytetrafluoroethylene and product resulting therefrom
Assignee: EIDP Inc
•
Filing: 1949-04-09
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Granted: 1951-01-23
•
Expires: 1969-04-09
Abstract
No abstract record available.
Inventors
- 👤 Sanders Philip Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:28
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/443; H01B3/445; B; B05; B05D; B05D7/00; B05D7/20; B29; B29C; B29C43/00; B29C43/22; B29C63/00; C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C03C25/28; C03C25/30; C03C25/305; C04; C04B; C04B26/00; C04B26/02; C04B26/04; C04B26/08; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/244; D06M15/256; H01B3/02; H01B3/08; H01B3/082; B05D2401/00; B05D2401/20; B05D2506/00; B05D2506/10; B05D2506/15; Y; Y10; Y10S; Y10S138/00; Y10S138/03; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/4971; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/20; Y10T442/2475; Y10T442/2926; Y10T442/2992
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE PROCESS OF COATING AN INORGANIC FABRIC WITH POLYTETRAFLUOROETHYLENE WHICH COMPRISES APPLYING A RELATIVELY THICK COATING OF AN AQUEOUS SUSPENSOID OF POLYTETRAFLUOROETHYLENE TO THE FABRIC, EVAPORATING THE AQUEOUS MEDIUM WITH THE RESULTANT FORMATION OF "MUD CRACKS" IN THE COATING BY HEATING TO BELOW THE FUSION TEMPERATURE OF THE POLYTETRAFLUOROETHYLENE, CALENDERING THE COATED FARBIC ON PRESSURE ROLLERS AND BELOW THE FUSION TEMPERATURE OF THE POLYTETRAFLUOROETHYLENE TO CLOSE TH E"MUD CRACKS", AND HEATING THE COATED FABRIC TO AT LEAST THE FUSION TEMPERATURE OF THE POLYTETRAFLUOROETHYLENE BUT BELOW THE TEMPERATURE WHICH WILL DELETERIOUSLY AFFECT THE COATED FARBIC.
Claim 2
Dependent Claim
94 words
THE PROCESS OF COATING AN INORGANIC FABRIC WITH POLYTETRAFLUOROETHYLENE WHICH COMPRISES APPLYING A RELATIVELY THICK COATING OF AN AQUEOUS SUSPENSOID OF POLYTETRAFLUOROETHYLENE TO THE FABRIC, EVAPORATING THE AQUEOUS MEDIUM WITH THE RESULTANT FORMATION OF "MUD CRACKS" IN THE COATING BY HEATING TO BELOW THE FUSION TEMPERATURE OF THE POLYTETRAFLUOROETHYLENE, CALENDERING THE COATED FARBIC ON PRESSURE ROLLERS AND BELOW THE FUSION TEMPERATURE OF THE POLYTETRAFLUOROETHYLENE TO CLOSE TH E"MUD CRACKS", AND HEATING THE COATED FABRIC TO AT LEAST THE FUSION TEMPERATURE OF THE POLYTETRAFLUOROETHYLENE BUT BELOW THE TEMPERATURE WHICH WILL DELETERIOUSLY AFFECT THE COATED FARBIC.
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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) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |