US3751288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solidifying a thin layer of metal on plastic film
Assignee: Dow Chemical Co
•
Filing: 1971-06-23
•
Granted: 1973-08-07
•
Expires: 1991-06-23
Abstract
Abstract Thin layers of lead, tin and other low melting metals are solidified on plastic film without destoying the integrity of such film by contacting a rapidly moving plastic film with the molten metal.
Inventors
- 👤 T Alfrey
- 👤 R Behr
- 👤 D Chisholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:59
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/003; C23C2/0035; C23C2/006; C23C2/0062; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
Process of claim 1 wherein the thin layer of metal is 0.2 mil thick tin and the plastic film is 2 mil thick polyethylene.
Claim 2
Dependent Claim
28 words
Process of claim 1 wherein excess molten metal is removed from the solidified layer of metal following the contact of the surface of the metal and the film.
References Cited (Backward Citations)
US2629907A
Cited
US2720076A
Cited
US2965513A
Cited
US2934458A
Cited
US3055768A
Cited
US3086879A
Cited
US2972185A
Cited
US3143738A
Cited
US3145119A
Cited
US3222195A
Cited
US3181967A
Cited
US3429741A
Cited
US3462288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |