US2847709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing unoriented formed articles from high polymers
Assignee: Eastman Kodak Co
•
Filing: 1955-03-14
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Granted: 1958-08-19
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Sterling S Sweet
- 👤 Kenneth W Scott
- 👤 Maurice H Van Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:29
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/04; B29C55/06; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF TREATING SHEETING FORMED FROM DIPHENYL SULFONE-4,4''-DICARBOXYLIC ACID, SUCCINIC ACID, PENTAMETHYLENE GLYCOL POLYMERS, WHICH POLYMERS CRYSTALLIZE SLOWLY WHEN STRETCHED, WHICH COMPRISES STRETCHING THE SHEETING SO THAT THE LENGTH OF THE SHEETING IN INCREASED 50% BUT NOT MORE THAN 250% OF ITS LENGTH AS INITIALLY FORMED, SAID STRETCHING BEING CARRIED OUT AT A TEMPERATURE FROM 50-100*C., COOLING THE STRETCHED SHEETING, THEN SUBJECTING THE SHEETING WITHOUT SUBSTANTIAL RESTRAINT THEREON TO A HEATING OF 2-10 MINUTES DURATION WITHIN THE TEMPERATURE RANGE OF 70*C.-180*C., WHEREBY THE SHEETING NOT BEING UNDER SUBSTANTIAL RESISTANT SHRINKS TO APPROXIMATELY NOT GREATER THAN 120% OF ITS ORIGINAL LENGTH AND CRYSTAL FORMATION TAKES PLACE IN THE HEATED SHEETING BUT THE CRYSTALS ARE SMALL SO THAT THEY ARE NOT LARGE ENOUGH TO SCATTER LIGHT.
Claim 2
Independent Claim
125 words
THE METHOD OF TREATING SHEETING FORMED FROM DIPHENYL SULFONE-4,4''-DICARBOXYLIC ACID, SUCCINIC ACID, PENTAMETHYLENE GLYCOL POLYMERS, WHICH POLYMERS CRYSTALLIZE SLOWLY WHEN STRETCHED, WHICH COMPRISES STRETCHING THE SHEETING SO THAT THE LENGTH OF THE SHEETING IN INCREASED 50% BUT NOT MORE THAN 250% OF ITS LENGTH AS INITIALLY FORMED, SAID STRETCHING BEING CARRIED OUT AT A TEMPERATURE FROM 50-100*C., COOLING THE STRETCHED SHEETING, THEN SUBJECTING THE SHEETING WITHOUT SUBSTANTIAL RESTRAINT THEREON TO A HEATING OF 2-10 MINUTES DURATION WITHIN THE TEMPERATURE RANGE OF 70*C.-180*C., WHEREBY THE SHEETING NOT BEING UNDER SUBSTANTIAL RESISTANT SHRINKS TO APPROXIMATELY NOT GREATER THAN 120% OF ITS ORIGINAL LENGTH AND CRYSTAL FORMATION TAKES PLACE IN THE HEATED SHEETING BUT THE CRYSTALS ARE SMALL SO THAT THEY ARE NOT LARGE ENOUGH TO SCATTER LIGHT.
References Cited (Backward Citations)
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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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |