US3012283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaping polyurethane plastics
Assignee: Bayer Corp
•
Filing: 1957-07-01
•
Granted: 1961-12-12
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 William C Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:25
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; B29C43/00; B29K; B29K2075/00; B29K2105/00; B29K2105/24; B29L; B29L2031/00; B29L2031/751; Y; Y10; Y10S; Y10S16/00; Y10S16/13; Y10S264/00; Y10S264/14; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD OF SHAPING A CELLULAR POLYURETHANE PLASTIC WHICH COMPRISES FORMING A FOAMABLE POLYURETHANE REACTION MIXTURE, ALLOWING THE MIXTURE TO EXPAND AND FORM A CELLULAR POLYURETHANE PLASTIC, ALLOWING THE PRODUCT TO CURE PARTIALLY BUT ONLY TO THE EXTENT THAT IT IS RESILIENT AND IT CAN BE CUT, CUTTING THE PARTIALLY CURED PRODUCT TO EXPOSE OPEN CELLS ON THE SURFACE THEREOF, PRESSING ONLY THE MARGINAL PORTIONS OF THE RESULTING OPEN-CELLED POLYURETHANE PLASTIC TO A THICKNESS LESS THAN THE THICKNESS OF THE REMAINDER THEREOF WHILE IT IS IN THE PARTIALLY CURED STATE, MAINTAINING THE PRESSURE ON THE SAID MARGINAL PORTIONS UNTIL THE SAID POLYURETHANE HAS COMPLETELY CURED, THEREAFTER RELEASING THE PRESSURE AND CUTTING THE MARGINAL PORTIONS FROM THE REMAINDER THEREOF, WHEREBY A SHAPED OPENCELLED PRODUCT IS OBTAINED.
Claim 2
Independent Claim
125 words
A METHOD OF SHAPING A CELLULAR POLYURETHANE PLASTIC WHICH COMPRISES FORMING A FOAMABLE POLYURETHANE REACTION MIXTURE, ALLOWING THE MIXTURE TO EXPAND AND FORM A CELLULAR POLYURETHANE PLASTIC, ALLOWING THE PRODUCT TO CURE PARTIALLY BUT ONLY TO THE EXTENT THAT IT IS RESILIENT AND IT CAN BE CUT, CUTTING THE PARTIALLY CURED PRODUCT TO EXPOSE OPEN CELLS ON THE SURFACE THEREOF, PRESSING ONLY THE MARGINAL PORTIONS OF THE RESULTING OPEN-CELLED POLYURETHANE PLASTIC TO A THICKNESS LESS THAN THE THICKNESS OF THE REMAINDER THEREOF WHILE IT IS IN THE PARTIALLY CURED STATE, MAINTAINING THE PRESSURE ON THE SAID MARGINAL PORTIONS UNTIL THE SAID POLYURETHANE HAS COMPLETELY CURED, THEREAFTER RELEASING THE PRESSURE AND CUTTING THE MARGINAL PORTIONS FROM THE REMAINDER THEREOF, WHEREBY A SHAPED OPENCELLED PRODUCT IS OBTAINED.
References Cited (Backward Citations)
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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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |