US3042973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing a shaped body of porous polystyrene foam of low density
Assignee: Individual
•
Filing: 1957-06-24
•
Granted: 1962-07-10
•
Expires: 1977-06-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick B Brockhues
- 👤 Muhm Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:36
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/44; B29C44/445; B29C33/00; B29C33/30; B29C44/3415; B29C44/3426; B29K; B29K2025/00; Y; Y10; Y10S; Y10S264/00; Y10S264/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PROCESS OF MANUFACTURING A SHAPED BODY OF POROUS POLYSTYRENE FOAM OF LOW DENSITY, SAID PROCESS COMPRISING THE STEPS OF PLACING EXPANDABLE POLYSTYRENE PARTICLES INTO A MOLD HAVING A PLURALITY OF ADJOINING WALLS, OPPOSITE ONES OF SAID WALLS BEING SPACED APART MORE THAN 25 CM., CONDUCTING STEAM THROUGH A MULTIPLICITY OF CLOSELY SPACED SLOTLIKE STEAM INELT OPENINGS IN ONLY SOME OF SAID WALLS OF THE MOLD INTO CONTACT WITH THE POLYSTYRENE PARTICLES TO EXPAND THE SAME, WHILE RETAINING THE EXPANDING POLYSTYRENE PARTICLES AT CLOSELY SPACED MOLD ZONES ACROSS THE ENTIRE SURFACE OF THE MOLD, SAID MOLD ZONES DEFINING THE SLOT-LIKE STEAM INLET OPENING THEREBETWEEN TO OBTAIN THE LOW-DENSITY POROUS SHAPED BODY OF POLYSTYRENE FOAM, HAVING OVER ITS ENTIRE SURFACE THIN REINFORCING LINES CORRESPONDING TO THE SLOT-LIKE STEAM INLET OPENING BETWEEN THE MOLD RETAINING ZONES, DRIVING MOISTURE OUT OF LIKE ONES OF SAID OPENINGS IN THE REMAINING WALLS OF SAID MOLD, THE STEAM CONDUCTED INTO SAID FIRST NAMED OPENINGS PUSHING SAID MOISTURE THROUGH SAID LAST-NAMED OPENINGS, AND,
Claim 2
Dependent Claim
166 words
A PROCESS OF MANUFACTURING A SHAPED BODY OF POROUS POLYSTYRENE FOAM OF LOW DENSITY, SAID PROCESS COMPRISING THE STEPS OF PLACING EXPANDABLE POLYSTYRENE PARTICLES INTO A MOLD HAVING A PLURALITY OF ADJOINING WALLS, OPPOSITE ONES OF SAID WALLS BEING SPACED APART MORE THAN 25 CM., CONDUCTING STEAM THROUGH A MULTIPLICITY OF CLOSELY SPACED SLOTLIKE STEAM INELT OPENINGS IN ONLY SOME OF SAID WALLS OF THE MOLD INTO CONTACT WITH THE POLYSTYRENE PARTICLES TO EXPAND THE SAME, WHILE RETAINING THE EXPANDING POLYSTYRENE PARTICLES AT CLOSELY SPACED MOLD ZONES ACROSS THE ENTIRE SURFACE OF THE MOLD, SAID MOLD ZONES DEFINING THE SLOT-LIKE STEAM INLET OPENING THEREBETWEEN TO OBTAIN THE LOW-DENSITY POROUS SHAPED BODY OF POLYSTYRENE FOAM, HAVING OVER ITS ENTIRE SURFACE THIN REINFORCING LINES CORRESPONDING TO THE SLOT-LIKE STEAM INLET OPENING BETWEEN THE MOLD RETAINING ZONES, DRIVING MOISTURE OUT OF LIKE ONES OF SAID OPENINGS IN THE REMAINING WALLS OF SAID MOLD, THE STEAM CONDUCTED INTO SAID FIRST NAMED OPENINGS PUSHING SAID MOISTURE THROUGH SAID LAST-NAMED OPENINGS, AND,
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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) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |