US3139466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for molding plastic foam objects
Assignee: Individual
•
Filing: 1961-03-13
•
Granted: 1964-06-30
•
Expires: 1981-03-13
Abstract
No abstract record available.
Inventors
- 👤 Couchman Timothy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:10
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C44/3415; B29C44/3426; B29L; B29L2031/00; B29L2031/712; B29L2031/7132; Y; Y10; Y10S; Y10S264/00; Y10S264/10; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF MOLDING EXPANDED PLASTIC ARTICLES WHICH COMPRISES THE STEPS OF PRE-HEATING A MOLD, OF CHARGING THE SAID MOLD WHILE SUBSTANTIALLY CLOSED WITH MATERIAL CAPABLE OF YIELDING EXPANDED PLASTIC AND ENTRAINED IN A STREAM OF AIR FLOWING INTO SAID MOLD THROUGH A FILLING ORIFICE SAID AIR ESCAPING FROM SAID MOLD THROUGH A VENTING OPENING, OF IMPARTING A ROTATIONAL SWIRLING MOTION TO SAID AIR STREAM AND THE MATERIAL ENTRAINED THEREIN, OF CUTTING OFF THE SUPPLY OF SAID MATERIAL WHEN THE SAID MOLD IS CHARGED, OF THEN PLUGGING THE SAID ORIFICE, OF TREATING THE MATERIAL IN THE MOLD TO YIELD AN EXPANDED PLASTIC, AND OF THEN OPENING THE SAID MOLD AND REMOVING THE EXPANDED PLASTIC ARTICLE.
Claim 2
Independent Claim
115 words
A METHOD OF MOLDING EXPANDED PLASTIC ARTICLES WHICH COMPRISES THE STEPS OF PRE-HEATING A MOLD, OF CHARGING THE SAID MOLD WHILE SUBSTANTIALLY CLOSED WITH MATERIAL CAPABLE OF YIELDING EXPANDED PLASTIC AND ENTRAINED IN A STREAM OF AIR FLOWING INTO SAID MOLD THROUGH A FILLING ORIFICE SAID AIR ESCAPING FROM SAID MOLD THROUGH A VENTING OPENING, OF IMPARTING A ROTATIONAL SWIRLING MOTION TO SAID AIR STREAM AND THE MATERIAL ENTRAINED THEREIN, OF CUTTING OFF THE SUPPLY OF SAID MATERIAL WHEN THE SAID MOLD IS CHARGED, OF THEN PLUGGING THE SAID ORIFICE, OF TREATING THE MATERIAL IN THE MOLD TO YIELD AN EXPANDED PLASTIC, AND OF THEN OPENING THE SAID MOLD AND REMOVING THE EXPANDED PLASTIC ARTICLE.
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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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |