US2686747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing elastic sealing material
Assignee: National Motor Bearing Co Inc
•
Filing: 1950-03-24
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Granted: 1954-08-17
•
Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
- 👤 John W Wurtz
- 👤 Greenwald Fred Alton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:40
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J2383/00; C08J2383/04; Y; Y10; Y10S; Y10S277/00; Y10S277/921; Y10S277/935; Y10S277/936; Y10S277/937; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF MAKING A HIGHLY COMPRESSIBLE ELONGATED SEALING MATERIAL HAVING A HIGH RESISTANCE TO PERMANENT DEFORMATION AND CHARACETERIZED BY HIGH RETENTION OF ITS ELASTIC PROPERTIES AT TEMPERATURES BELOW -100* F. WHICH COMPRISES INCORPORATING INTO A POLYSILOXANE ELASTOMER ABOUT 1/2 TO 2% OF AN EXPANSION AGENT CAPABLE OF LIBERATING AN INERT GAS WHEN HEATED, EXTRUDING THE RESULTING COMPOSITION IN THE FORM OF AN ELONGATED CORE OF RELATIVELY SMALL CROSS SECTION, SUBJECTING SAID EXTRUDED CORE TO HEATING TO A TEMPERATURE OF ABOUT 250* TO 550* F. WHEREBY THE POLYSILOXANE IS EXPANDED INTO MULTICELLULAR FORM, RUPTURING THE CELL WALLS THAT THE CELLS INTERCONNECT AND ARE EXPOSED TO THE ATMOSPHERE,
Claim 2
Independent Claim
107 words
THE METHOD OF MAKING A HIGHLY COMPRESSIBLE ELONGATED SEALING MATERIAL HAVING A HIGH RESISTANCE TO PERMANENT DEFORMATION AND CHARACETERIZED BY HIGH RETENTION OF ITS ELASTIC PROPERTIES AT TEMPERATURES BELOW -100* F. WHICH COMPRISES INCORPORATING INTO A POLYSILOXANE ELASTOMER ABOUT 1/2 TO 2% OF AN EXPANSION AGENT CAPABLE OF LIBERATING AN INERT GAS WHEN HEATED, EXTRUDING THE RESULTING COMPOSITION IN THE FORM OF AN ELONGATED CORE OF RELATIVELY SMALL CROSS SECTION, SUBJECTING SAID EXTRUDED CORE TO HEATING TO A TEMPERATURE OF ABOUT 250* TO 550* F. WHEREBY THE POLYSILOXANE IS EXPANDED INTO MULTICELLULAR FORM, RUPTURING THE CELL WALLS THAT THE CELLS INTERCONNECT AND ARE EXPOSED TO THE ATMOSPHERE,
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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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |