Patent US2763897A successfully refreshed from Google Patents.
US2763897A
Expired / Lapsed
US
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Method of making closed cell cellular compositions
Assignee: Goodyear Tire and Rubber Co
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Filing: 1953-02-20
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Granted: 1956-09-25
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Expires: 1973-02-20
Abstract
No abstract record available.
Inventors
- 👤 George H Gates
- 👤 Harold J Osterhof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE METHOD OF FORMING A CELLULAR, CLOSED CELL, GASEXPANDED ARTICLE, WHICH COMPRISING HEATING UNDER POSITIVE PRESSURE A CURABLE MATERIAL CONTAINING (1) A NITROGEN PRODUCING BOWING AGENT WHICH DECOMPOSES AT A TEMPERATURE BELOW THE VULCANIZATION TEMPERATURE OF THE CURABLE MATERIAL, (2) A VULCANIZATION AGENT AND (3) A VULCANIZATION ACCELERATOR, WHICH VULCANIZATION AGENT AND VULCANIZATION ACCELERATOR INDUCE VULCANIZATION OF THE CURABLE MATERIAL ONLY AT A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERTURE OF THE BLOWING AGENT, TO A TEMPERATURE OF THE DECOMPOSITION TEMPERATURE OF THE BLOWING AGENT AND AT A TEMPERATURE BELOW THE VULCANIZATION TEMPERATURE OF THE CURABLE MATERIAL, GRADUALLY RELEASING THE PRESSURE ON THE UNCURED MATERIAL TO ALLOW THE MATERIAL TO EXPAND TO A DESIRED FINAL DIMENSION, AND THEN VULCANIZING THE EXPANDED MATERIAL AT A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE BLOWING AGENT TO A DESIRED FINAL STATE OF CURE.
Claim 2
Independent Claim
138 words
THE METHOD OF FORMING A CELLULAR, CLOSED CELL, GASEXPANDED ARTICLE, WHICH COMPRISING HEATING UNDER POSITIVE PRESSURE A CURABLE MATERIAL CONTAINING (1) A NITROGEN PRODUCING BOWING AGENT WHICH DECOMPOSES AT A TEMPERATURE BELOW THE VULCANIZATION TEMPERATURE OF THE CURABLE MATERIAL, (2) A VULCANIZATION AGENT AND (3) A VULCANIZATION ACCELERATOR, WHICH VULCANIZATION AGENT AND VULCANIZATION ACCELERATOR INDUCE VULCANIZATION OF THE CURABLE MATERIAL ONLY AT A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERTURE OF THE BLOWING AGENT, TO A TEMPERATURE OF THE DECOMPOSITION TEMPERATURE OF THE BLOWING AGENT AND AT A TEMPERATURE BELOW THE VULCANIZATION TEMPERATURE OF THE CURABLE MATERIAL, GRADUALLY RELEASING THE PRESSURE ON THE UNCURED MATERIAL TO ALLOW THE MATERIAL TO EXPAND TO A DESIRED FINAL DIMENSION, AND THEN VULCANIZING THE EXPANDED MATERIAL AT A TEMPERATURE ABOVE THE DECOMPOSITION TEMPERATURE OF THE BLOWING AGENT TO A DESIRED FINAL STATE OF CURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |