Patent US2968538A successfully refreshed from Google Patents.
US2968538A
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US
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Assignee: EIDP Inc
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Filing: 1956-11-15
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Granted: 1961-01-17
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Expires: 1976-11-15
Abstract
No abstract record available.
Inventors
- 👤 Chapman Aurelius Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR DELUSTERING THE SURFACE OF SHAPED STRUCTURES OF POLYETHYLENE TEREPHTHALATE WHICH COMPRISES THE STEPS, IN SEQUENCE, OF TREATING THE SURFACE WITH A SOLUTION CONTAINING 2-35% BY WEIGHT OF AN ALKALI METAL HYDROXIDE AND 2-5% BY WEIGHT OF AN ANIONIC WETTING AGENT IN A VOLATILE SOLVENT; HEATING THE TREATED STRUCTURE TO DRIVE
Claim 2
Dependent Claim
53 words
A PROCESS FOR DELUSTERING THE SURFACE OF SHAPED STRUCTURES OF POLYETHYLENE TEREPHTHALATE WHICH COMPRISES THE STEPS, IN SEQUENCE, OF TREATING THE SURFACE WITH A SOLUTION CONTAINING 2-35% BY WEIGHT OF AN ALKALI METAL HYDROXIDE AND 2-5% BY WEIGHT OF AN ANIONIC WETTING AGENT IN A VOLATILE SOLVENT; HEATING THE TREATED STRUCTURE TO DRIVE
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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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |