US3170967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making vinyl foam seals
Assignee: Motors Liquidation Co
•
Filing: 1960-03-25
•
Granted: 1965-02-23
•
Expires: 1980-03-25
Abstract
No abstract record available.
Inventors
- 👤 Lyle N Williams
- 👤 Harry R Alley
- 👤 Harold K Barnhizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:37
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14; Y; Y10; Y10S; Y10S425/00; Y10S425/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD OF MAKING A POLYVINYL FOAM SEALING STRIP COMPRISING THE STEPS OF FILLING A MOLD CAVITY HAVING A CONFIGURATION OF SAID SEALING STRIP TO BE FORMED WITH A VINYL PLASTISOL CAPABLE ON FUSION OF FORMING A FLEXIBLE SOLID NON-POROUS MATERIAL, APPLYING SUFFICIENT HEAT TO SAID MOLD TO CAUSE SAID PLASTISOL TO FORM A GELLED LAYER OF PREDETERMINED THICKNESS ADJACENT THE MOLD CAVITY SURFACES, WITHDRAWING THE UNGELLED VINYL PLASTISOL FROM SAID MOLD CAVITY, DEPOSITING A QUANTITY OF A FOAMABLE VINYL PLASTISOL INTO SAID MOLD CAVITY, SAID QUANTITY BEING SUFFICIENT ON EXPANDING TO COMPLETELY FILL THE MOLD CAVITY, APPLYING ADDITIONAL HEAT TO SAID MOLD AT A TEMPERATURE CAPABLE OF CAUSING SAID FOAMABLE PLASTISOL TO EXPAND AND COMPLETELY FILL THE MOLD CAVITY, HEATING THE MOLD TO BETWEEN ABOUT 325*F. AND 335*F. WHEREBY SAID FOAMED MATERIAL IS FUSED WITH SAID LAYER TO FORM A FLEXIBLE, SELF-SUSTAINING STRIP, COOLING THE FORMED SEALING STRIP TO APPROXIMATELY ROOM TEMPERATURE AND FINALLY SUBJECTING SAID SEALING STRIP TO A HEAT AGING TREATMENT OF AT LEAST FOUR HOURS AT A TEMPERATURE IN THE RANGE OF 175*F. TO 200*F.
Claim 2
Independent Claim
179 words
A METHOD OF MAKING A POLYVINYL FOAM SEALING STRIP COMPRISING THE STEPS OF FILLING A MOLD CAVITY HAVING A CONFIGURATION OF SAID SEALING STRIP TO BE FORMED WITH A VINYL PLASTISOL CAPABLE ON FUSION OF FORMING A FLEXIBLE SOLID NON-POROUS MATERIAL, APPLYING SUFFICIENT HEAT TO SAID MOLD TO CAUSE SAID PLASTISOL TO FORM A GELLED LAYER OF PREDETERMINED THICKNESS ADJACENT THE MOLD CAVITY SURFACES, WITHDRAWING THE UNGELLED VINYL PLASTISOL FROM SAID MOLD CAVITY, DEPOSITING A QUANTITY OF A FOAMABLE VINYL PLASTISOL INTO SAID MOLD CAVITY, SAID QUANTITY BEING SUFFICIENT ON EXPANDING TO COMPLETELY FILL THE MOLD CAVITY, APPLYING ADDITIONAL HEAT TO SAID MOLD AT A TEMPERATURE CAPABLE OF CAUSING SAID FOAMABLE PLASTISOL TO EXPAND AND COMPLETELY FILL THE MOLD CAVITY, HEATING THE MOLD TO BETWEEN ABOUT 325*F. AND 335*F. WHEREBY SAID FOAMED MATERIAL IS FUSED WITH SAID LAYER TO FORM A FLEXIBLE, SELF-SUSTAINING STRIP, COOLING THE FORMED SEALING STRIP TO APPROXIMATELY ROOM TEMPERATURE AND FINALLY SUBJECTING SAID SEALING STRIP TO A HEAT AGING TREATMENT OF AT LEAST FOUR HOURS AT A TEMPERATURE IN THE RANGE OF 175*F. TO 200*F.
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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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |