Patent US2422956A successfully refreshed from Google Patents.
US3300554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making cellular articles
Assignee: AT&T Inc
•
Filing: 1963-09-27
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Granted: 1967-01-24
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Expires: 1983-09-27
Abstract
No abstract record available.
Inventors
- 👤 Benson F Bachus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:47
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C44/34; B29C44/36; B29C44/46; B29C44/50; B29C44/507; B29C48/00; B29C48/15; B29C48/25; B29C48/92; H; H01; H01B; H01B13/00; H01B13/06; H01B13/14; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/9258; B29C2948/92609; B29C2948/92619; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92895; B29C2948/92904; B29C2948/92923; B29C2948/92933; B29C48/03; B29C48/06; B29L; B29L2031/00; B29L2031/34; B29L2031/3462; Y; Y10; Y10S; Y10S264/00; Y10S264/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
THE METHOD OF PRODUCING AN ARTICLE HAVING AT LEAST A PORTION THEREOF OF CELLULAR CONSTRUCTION, WHICH COMPRISES: WORKING MATERIAL AND A HEAT DECOMPOSABLE BLOWING AGENT FOR EXPANDING THE MATERIAL IN AN EXTRUSION APPARATUS BY AN EXTRUSION SCREW UNDER HEAT AND PRESSURE TO LIQUEFY THE MATERIAL AND TO DECOMPOSSE THE BLOWING AGENT WHILE ADVANCING THE MATERIAL BY THE SCREW TO A PRESSURE TYPE EXTRUSION DIE FOR EXTRUDING THE MATERIAL; MAINTAINING THE TEMPERATURE OF THE MATERIAL AT THE DISCHARGE END OF THE SCREW AND THE ENTRANCE TO THE DIE SUBSTANTIALLY CONSTANT, WITH THE TEMPERATURE OF AT LEAST A PORTION OF THE MATERIAL BETWEEN THE DISCHARGE END OF THE SCREW AND THE ENTRANCE TO THE DIE AT LEAST EQUAL TO THE DECOMPOSITION TEMPERATURE OF THE BLOWING AGENT; MAINTAINING A PRESSURE DROP BETWEEN THE DISCHARGE END OF THE SCREW AND THE ENTRANCE TO THE DIE SUBSTANTIALLY CONSTANT AT A VALUE SUCH THAT THE MAJOR PORTION OF THE TOTAL EXPANSION OF THE MATERIAL WHICH TAKES PLACE OCCURS BETWEEN THE DISCHARGE END OF THE SCREW AND THE ENTRANCE TO THE DIE.
Claim 2
Independent Claim
175 words
THE METHOD OF PRODUCING AN ARTICLE HAVING AT LEAST A PORTION THEREOF OF CELLULAR CONSTRUCTION, WHICH COMPRISES: WORKING MATERIAL AND A HEAT DECOMPOSABLE BLOWING AGENT FOR EXPANDING THE MATERIAL IN AN EXTRUSION APPARATUS BY AN EXTRUSION SCREW UNDER HEAT AND PRESSURE TO LIQUEFY THE MATERIAL AND TO DECOMPOSSE THE BLOWING AGENT WHILE ADVANCING THE MATERIAL BY THE SCREW TO A PRESSURE TYPE EXTRUSION DIE FOR EXTRUDING THE MATERIAL; MAINTAINING THE TEMPERATURE OF THE MATERIAL AT THE DISCHARGE END OF THE SCREW AND THE ENTRANCE TO THE DIE SUBSTANTIALLY CONSTANT, WITH THE TEMPERATURE OF AT LEAST A PORTION OF THE MATERIAL BETWEEN THE DISCHARGE END OF THE SCREW AND THE ENTRANCE TO THE DIE AT LEAST EQUAL TO THE DECOMPOSITION TEMPERATURE OF THE BLOWING AGENT; MAINTAINING A PRESSURE DROP BETWEEN THE DISCHARGE END OF THE SCREW AND THE ENTRANCE TO THE DIE SUBSTANTIALLY CONSTANT AT A VALUE SUCH THAT THE MAJOR PORTION OF THE TOTAL EXPANSION OF THE MATERIAL WHICH TAKES PLACE OCCURS BETWEEN THE DISCHARGE END OF THE SCREW AND THE ENTRANCE TO THE DIE.
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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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |