US2689805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating polytetrafluoroethylene articles and resulting articles
Assignee: 3M Co
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Filing: 1952-06-30
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Granted: 1954-09-21
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Expires: 1972-06-30
Abstract
No abstract record available.
Inventors
- 👤 Martin W Croze
- 👤 Paul L Hedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:03
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2804; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF PROVIDING A THIN, FLEXIBLE, CONTINUOUS, FIRMLY BONDED METALLIC COATING ON A SURFACE OF A SINTERED THIN POLYTETRAFLUOROETHYLENE FILM, COMPRISING FORMING AN UNSINTERED SELF-SUPPORTING POLYTERTRAFLUOROETHYLENE FILM, PLACING SAID FILM UNDER VACUUM AND DEPOSITING THEREON, FROM VAPOR STATE, A THIN CONTINUOUS METALLIC COATING NON-FUSING AT THE SINTERING TEMPERATURE OF THE POLYTETRAFLUORETHYLENE; AND THEN HEATING AND SINTERING THE THUS COATED FILM WITHOUT FUSING SAID METALLIC COATING.
Claim 2
Independent Claim
66 words
THE METHOD OF PROVIDING A THIN, FLEXIBLE, CONTINUOUS, FIRMLY BONDED METALLIC COATING ON A SURFACE OF A SINTERED THIN POLYTETRAFLUOROETHYLENE FILM, COMPRISING FORMING AN UNSINTERED SELF-SUPPORTING POLYTERTRAFLUOROETHYLENE FILM, PLACING SAID FILM UNDER VACUUM AND DEPOSITING THEREON, FROM VAPOR STATE, A THIN CONTINUOUS METALLIC COATING NON-FUSING AT THE SINTERING TEMPERATURE OF THE POLYTETRAFLUORETHYLENE; AND THEN HEATING AND SINTERING THE THUS COATED FILM WITHOUT FUSING SAID METALLIC COATING.
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) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |