US2856638A
Expired / Lapsed
US
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Process for the after-treatment of polymeric articles
Assignee: Eastman Kodak Co
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Filing: 1954-07-20
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Granted: 1958-10-21
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Expires: 1974-07-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Roger M Schulken
- 👤 Wilbur I Kaye
- 👤 John W Tamblyn
- 👤 Long Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/08; D06M13/085; D01; D01F; D01F6/00; D01F6/58; D01F6/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A PROCESS FOR IMPROVING A FORMED ARTICLE FORMED FROM A HIGH POLYMER OBTAINED BY THE REACTION OF A HYDROXY COMPOUND AND AN AROMATIC ACID, WHICH COMPRISES FABRICATING THE POLYMERIC MATERIAL INTO THE DESIRED FORM OF ARTICLE, ORIENTING THE ARTICLE BY TENSION AND SUBJECTING THE ORIENTED ARTICLE TO TREATMENT FOR A BRIEF PERIOD WITH VAPORS ESSENTIALLY COMPRISED OF AN ORGANIC CHEMICAL HAVING A HIGH PENETRATING POWER FOR THE POLYMER WITHOUT DISSOLVING THE POLYMER FROM THE GROUP CONSISTING OF ACETONE AND METHYLENE CHLORIDE, WHICH VAPORS IMPART LUBRICITY TO THE POLYMER MOLECULES TO FACILITATE AND CHANGE FROM AN AMORPHOUS TO A CRYSTALLINE FORM.
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |