Patent US3616019A successfully refreshed from Google Patents.
US3616019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of laminated plane building components comprisng a thermoplastic inner layer and metal outer plies
Assignee: BASF SE
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Filing: 1968-11-13
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Granted: 1971-10-26
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Expires: 1988-11-13
Abstract
Abstract A process for the production of plane building components, comprising relatively thick inner ply of a thermoplastic and relatively thin outer plies of metal. In the process a board is prepared continuously from a polyethylene by means of an extruder at elevated temperature, the board thus obtained is continuously covered on each side first with a film of an ethylene polymer containing carboxyl groups by means of at least one pair of rollers and then with metal sheeting, the whole being made into a sandwich assembly under roller pressure and the plane building component formed being cooled to ambient temperature.
Inventors
- 👤 Heinz Mueller-Tamm
- 👤 Dieter Mahling
- 👤 Hans Friedlingsdorf
- 👤 Alfred Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:53
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/15; B32B37/153; B32B15/00; B32B15/04; B32B15/08; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J5/128; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
A process as claimed in claim 1 wherein the temperature of said polyethylene during extrusion is 150* to 220* C.
Claim 2
Dependent Claim
25 words
A process as claimed in claim 1 wherein the temperature of said polyethylene during the applying of said film is from 110* to 180* C.
Claim 3
Dependent Claim
26 words
A process as claimed in claim 1 wherein the sheet of metal is thinner by a factor of from 5 to 15 than the polyethylene board.
Claim 4
Dependent Claim
19 words
A process as claimed in claim 1 wherein the metal sheeting is sheeting of aluminum, copper, brass or steel.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |