US3729046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing foil
Assignee: Airco Inc
•
Filing: 1971-09-10
•
Granted: 1973-04-24
•
Expires: 1991-09-10
Abstract
Abstract A process is described for manufacturing dense, ductile metallic foil by vacuum evaporation. The foil is produced by vacuum evaporating and depositing the metal of the foil on a high temperature substrate. A fluoride salt release agent is used to facilitate the removal of the condensed magnetic metallic material from the substrate.
Inventors
- 👤 K Kennedy
- 👤 M Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:45
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/0005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
55 words
A process according to claim 1 wherein the substrate is heated, during condensation of the metallic content, to and maintained at a temperature of at least about 800* Kelvin, and less than about 1400* Kelvin, and wherein the fluoride salt is of a material selected from the group consisting of magnesium, calcium, strontium and barium.
Claim 2
Dependent Claim
41 words
A process according to claim 1 wherein the substrate is heated, during condensation of the metallic content, to and maintained at a temperature within the range from about 800* Kelvin to 1400* Kelvin, and wherein the fluoride salt comprises calcium fluoride.
Claim 3
Dependent Claim
45 words
A process according to claim 1 wherein the substrate is heated during condensation of the metallic content, to and maintained at least about 1000* Kelvin, and wherein the fluoride salt is of a metal selected from the group consisting of magnesium, calcium, strontium, and barium.
References Cited (Backward Citations)
US1128058A
Cited
US1179762A
Cited
US3035318A
Cited
US3244852A
Cited
US3270381A
Cited
US3631745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |