US2951774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of metallizing polytetrafluoroethylene
Assignee: Sprague Electric Co
•
Filing: 1955-12-12
•
Granted: 1960-09-06
•
Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 David B Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:42
CPC Classifications
H; H01; H01G; H01G13/00; H01G13/06; B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/20; H01B; H01B1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS OF PRODUCING A FIRMLY ADHERENT LOW RESISTANCE METALLIZED COATING UPON A POLYTETRAFLUOROETHYLENE RESINOUS FILM WHICH COMPRISES PLACING SAID FILM WITHIN AN EVACUATED CHAMBER AT A PRESSURE OF LESS THAN 50 MICRONS AND DIRECTING METALLIC VAPOR ONTO THE SURFACE OF SAID FILM FROM A BODY OF MOLTEN METAL LOCATED BETWEEN 3" AND 15" FROM SAID FILM.
Claim 2
Dependent Claim
57 words
A PROCESS OF PRODUCING A FIRMLY ADHERENT LOW RESISTANCE METALLIZED COATING UPON A POLYTETRAFLUOROETHYLENE RESINOUS FILM WHICH COMPRISES PLACING SAID FILM WITHIN AN EVACUATED CHAMBER AT A PRESSURE OF LESS THAN 50 MICRONS AND DIRECTING METALLIC VAPOR ONTO THE SURFACE OF SAID FILM FROM A BODY OF MOLTEN METAL LOCATED BETWEEN 3" AND 15" FROM SAID FILM.
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) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |