US3133978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming foamed polyurethane using a silicone elastomer containing mold
Assignee: BAYBAK MIDDLESEX A TRUST Co OF
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Filing: 1962-08-31
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Granted: 1964-05-19
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Expires: 1982-08-31
Abstract
No abstract record available.
Inventors
- 👤 Donald R Bartley
- 👤 George S Irby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:14
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/44; B29C44/00; B29C44/34; B29C44/58; B29C33/20; B29C33/38; B29C33/40; B29C33/405; B29K; B29K2075/00; B29K2105/00; B29K2105/04; Y; Y10; Y10S; Y10S425/00; Y10S425/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A METHOD OF FORMING A FOAMED POLYURETHANE BETWEEN A PLURALITY OF MOLDS AND WHEREIN THERE IS A STRONG EXOTHERM DURING THE FOAMING REACTION AND WHEREIN ONE OF SAID MOLDS IS A RIGID SHELL TO WHICH THE FOAMED POLYURETHANE STRONGLY ADHERES, THE IMPROVEMENT COMPRISING EMPLOYING A SILICONE ELASTOMER AS AT LEAST A MAJOR PART OF THE FOAM CONTACTING SURFACE OF A SECOND OF SAID MOLDS WHEREBY SAID FOAMED POLYURETHANE CAN BE REDILY RELEASED FROM SAID SECOND MOLD WHILE STILL RETAINING ITS ADHERENCE TO SAID ONE MOLD.
Claim 2
Dependent Claim
86 words
IN A METHOD OF FORMING A FOAMED POLYURETHANE BETWEEN A PLURALITY OF MOLDS AND WHEREIN THERE IS A STRONG EXOTHERM DURING THE FOAMING REACTION AND WHEREIN ONE OF SAID MOLDS IS A RIGID SHELL TO WHICH THE FOAMED POLYURETHANE STRONGLY ADHERES, THE IMPROVEMENT COMPRISING EMPLOYING A SILICONE ELASTOMER AS AT LEAST A MAJOR PART OF THE FOAM CONTACTING SURFACE OF A SECOND OF SAID MOLDS WHEREBY SAID FOAMED POLYURETHANE CAN BE REDILY RELEASED FROM SAID SECOND MOLD WHILE STILL RETAINING ITS ADHERENCE TO SAID ONE MOLD.
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) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |