Patent US2502171A successfully refreshed from Google Patents.
US3703585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
D.c. sputtering of particulate polymeric compounds onto a substrate
Assignee: Eastman Kodak Co
•
Filing: 1970-06-24
•
Granted: 1972-11-21
•
Expires: 1990-06-24
Abstract
Abstract A POLYMERIC MATERIAL SUCH AS TEFLON POLYTETRAFLUOROETHYLENE (PTFE) IS GLOW COATED ON A SUBSTRATE INSIDE A CHAMBER BY PLACING A THIN LAYER OF PTFE POWDER IN A SHALLOW TRAY CONSTITUTING A CATHODE, AND APPLYING A D.C. POTENTIAL BETWEEN THE CATHODE AND AN ANODE TO SPUTTER THE POLYMERIC MATERIAL AND FORM A THIN FILM ON THE SUBSTRATE. THE SUBSTRATE CAN BE A PART OF THE ANODE.
Inventors
- 👤 John L Agnone
- 👤 Robert V Fister
- 👤 Jon C Sheppard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:48
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/34; C23C14/06; C23C14/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |