US3345442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding sheet material from a uniform mixture of pre-expanded thermoplastic particles and a solid particulate additive
Assignee: Dyfoam Corp
•
Filing: 1964-09-30
•
Granted: 1967-10-03
•
Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 Oxel Berton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:36
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/20; B29C44/206; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C44/3415; B29C44/3426; Y; Y10; Y10S; Y10S264/00; Y10S264/07; Y10S52/00; Y10S52/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THEMETHOD OF MOLDING SHEET MATERIAL FROM A MIXTURE OF BEADS OF PARTIALLY PRE-EXPANDED SYNTHETIC THERMOPLASTIC MATERIAL AND A SOLID PARTICULATE ADDITIVE MATERIAL OF DIFFERENT DENSITY THAN THAT OF SAID PRE-EXPANDED MATERIAL, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF: (A) FEEDING A MASS OF SAID BEADS OF PARTIALLY PRE-EX PANDED MATERIAL IN A DIRECTION TOWARD A MOLDING ZZONE; (B) INTRODUCING SAID SOLID PARTICULATE ADDITIVE MATERIAL INTO THE MASS OF SAID PRE-EXPANDED MATERIAL WHILE THE LATTER IS BEING FED TOWARD SAID ZONE; (C) UNIFORMLY MIXING SAID PRE-EXPANDED MATERIAL AND SAID ADDITIVE MATERIAL WHILE THE SAME ARE BEING FED IN SAID DIRECTIONS;
Claim 2
Dependent Claim
100 words
IN THEMETHOD OF MOLDING SHEET MATERIAL FROM A MIXTURE OF BEADS OF PARTIALLY PRE-EXPANDED SYNTHETIC THERMOPLASTIC MATERIAL AND A SOLID PARTICULATE ADDITIVE MATERIAL OF DIFFERENT DENSITY THAN THAT OF SAID PRE-EXPANDED MATERIAL, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF: (A) FEEDING A MASS OF SAID BEADS OF PARTIALLY PRE-EX PANDED MATERIAL IN A DIRECTION TOWARD A MOLDING ZZONE; (B) INTRODUCING SAID SOLID PARTICULATE ADDITIVE MATERIAL INTO THE MASS OF SAID PRE-EXPANDED MATERIAL WHILE THE LATTER IS BEING FED TOWARD SAID ZONE; (C) UNIFORMLY MIXING SAID PRE-EXPANDED MATERIAL AND SAID ADDITIVE MATERIAL WHILE THE SAME ARE BEING FED IN SAID DIRECTIONS;
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |