US3400037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing cellular packing materials
Assignee: Alta Industries Inc
•
Filing: 1964-11-13
•
Granted: 1968-09-03
•
Expires: 1984-11-13
Abstract
No abstract record available.
Inventors
- 👤 James R Sare
- 👤 Richard L Ropiequet
- 👤 Duncan G Bergeron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:07
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/30; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C48/00; B29C48/001; B29C48/0022; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30203; B01J2219/304; B01J2219/30466; B29C2793/00; B29C2793/0027; B29C48/0012; B29C48/0019; B29C48/03; B29C48/05; B29C48/06; B29K; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/712; B29L2031/7138; B29L2031/714; B29L2031/772; Y; Y10; Y10S; Y10S206/00; Y10S206/819; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
112 words
THE METHOD OF MAKING AN ARTICLE OF EXTRUDABLE, EXPANDABLE SYNTHETIC PLASTIC MATERIAL, COMPRISING: (A) EXTRUDING THE MATERIAL UNDER PRESSURE THROUGH A DIE ORIFICE TO AN ATMOSPHERE OF LOWER PRESSURE TO INITIALLY EXPAND THE EXTRUDED FILAMENT TO ROD FORM OF LARGER CROSS SECTIONAL DIMENSION, (B) CUTTING THE EXPANDED ROD FORM TRANSVERSELY INTO A MULTIPLICITY OF FLAT, THIN WAFERS EACH HAVING A CROSS SECTIONAL THICKNESS SUBSTANTIALLY LESS THAN ITS PERIPHERAL DIMENSIONS, AND (C) SUBJECTING THE WAFERS TO THE ACTION OF STEAM AT ELEVATED TEMPERATURE FOR A TIME SUFFICIENT TO EFFECT WARPING OF THE WAFERS TO A SHAPE HAVING CURVILINEAR TOP AND BOTTOM SURFACES AND A CROSS SECTIONAL THICKNESS SUBSTANTIALLY LESS THAN THEIR PERIPHERAL DIMENSIONS.
Claim 2
Independent Claim
112 words
THE METHOD OF MAKING AN ARTICLE OF EXTRUDABLE, EXPANDABLE SYNTHETIC PLASTIC MATERIAL, COMPRISING: (A) EXTRUDING THE MATERIAL UNDER PRESSURE THROUGH A DIE ORIFICE TO AN ATMOSPHERE OF LOWER PRESSURE TO INITIALLY EXPAND THE EXTRUDED FILAMENT TO ROD FORM OF LARGER CROSS SECTIONAL DIMENSION, (B) CUTTING THE EXPANDED ROD FORM TRANSVERSELY INTO A MULTIPLICITY OF FLAT, THIN WAFERS EACH HAVING A CROSS SECTIONAL THICKNESS SUBSTANTIALLY LESS THAN ITS PERIPHERAL DIMENSIONS, AND (C) SUBJECTING THE WAFERS TO THE ACTION OF STEAM AT ELEVATED TEMPERATURE FOR A TIME SUFFICIENT TO EFFECT WARPING OF THE WAFERS TO A SHAPE HAVING CURVILINEAR TOP AND BOTTOM SURFACES AND A CROSS SECTIONAL THICKNESS SUBSTANTIALLY LESS THAN THEIR PERIPHERAL DIMENSIONS.
Claim 3
Dependent Claim
28 words
AN ARTICLE OF MANUFACTURE COMPRISING AN EXPANDED SYNTHETIC PLASTIC MATERIAL HAVING A CURVILINEAR TOP AND BOTTOM SURFACES AND A CROSS SECTIONAL THICKNESS SUBSTANTIALLY LESS THAN ITS PERIPHERAL DIMENSIONS.
Claim 4
Dependent Claim
28 words
AN ARTICLE OF MANUFACTURE COMPRISING AN EXPANDED SYNTHETIC PLASTIC MATERIAL HAVING A CURVILINEAR TOP AND BOTTOM SURFACES AND A CROSS SECTIONAL THICKNESS SUBSTANTIALLY LESS THAN ITS PERIPHERAL DIMENSIONS.
References Cited (Backward Citations)
US3033806A
Cited
US3066382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |