Patent US3655840A successfully refreshed from Google Patents.
US3655840A
Expired / Lapsed
US
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Process for the manufacture of foam-plastic articles covered with a protective film
Assignee: Carl Freudenberg KG
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Filing: 1969-04-28
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Granted: 1972-04-11
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Expires: 1989-04-28
Abstract
Abstract THE IMPROVEMENTS IN THE PRODUCTION OF FOAM-FORM ATICLES HAVING A FILM-FORM MEMBER ON AT LEAST ONE SURFACE THEREOF BY PLACING THE FILM-FORM MEMBER IN A SUITABLE FEMALE MOLD AND PERMITTING FOAMABLE MATERIAL TO FOAM ON THE FILM-FORM MEMBER WITHIN THE MOLD, WHEREBY
Inventors
- 👤 Hans-Dietrich Krug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:46
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14
Claims Analysis
Total Claims: 0
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |