Patent US2559298A successfully refreshed from Google Patents.
US2931068A
Expired / Lapsed
US
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Process for elongating a synthetic resin structure
Assignee: EIDP Inc
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Filing: 1958-02-28
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Granted: 1960-04-05
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Expires: 1978-02-28
Abstract
No abstract record available.
Inventors
- 👤 Robert E Kitson
- 👤 Cecil E Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10S; Y10S260/00; Y10S260/23; Y10S264/00; Y10S264/71; Y10S264/73; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN THE PROCESS IN WHICH A SPONTANEOUSLY EXTENSIBLE LINEAR TREPHTHALATE POLYESTER STRUCTURE IS HEATED AT A TEMPERATURE ABOVE 70*C. TO PRODUCE AN INCREASE IN CRYSTALLINITY AND A SPONTANEOUS AN IRREVERSIBLE EXTENSION IN LENGTH O SAID POLYESTER STRUCTURE, THE IMPROVEMENT WHICH COMPRISES FURTHER INCREASING THE CRYSTALLYINITY AND LENGTH OF SAID POLYESTER STRUCTURE BY HEATING IT A SECOND TIME AT A TEMPERATURE ABOVE 70*C.
Claim 2
Dependent Claim
62 words
IN THE PROCESS IN WHICH A SPONTANEOUSLY EXTENSIBLE LINEAR TREPHTHALATE POLYESTER STRUCTURE IS HEATED AT A TEMPERATURE ABOVE 70*C. TO PRODUCE AN INCREASE IN CRYSTALLINITY AND A SPONTANEOUS AN IRREVERSIBLE EXTENSION IN LENGTH O SAID POLYESTER STRUCTURE, THE IMPROVEMENT WHICH COMPRISES FURTHER INCREASING THE CRYSTALLYINITY AND LENGTH OF SAID POLYESTER STRUCTURE BY HEATING IT A SECOND TIME AT A TEMPERATURE ABOVE 70*C.
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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |