Patent US3255210A successfully refreshed from Google Patents.
US3255210A
Expired / Lapsed
US
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Process for aerating cyclic acetals
Assignee: EIDP Inc
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Filing: 1961-03-16
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Granted: 1966-06-07
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Expires: 1981-03-16
Abstract
No abstract record available.
Inventors
- 👤 Carol K Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:06
CPC Classifications
C; C08; C08F; C08F24/00; C09; C09D; C09D137/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE PROCESS WHICH CONSISTS ESSENTIALLY OF OXYGENATING LIQUID CYCLIC ACETAL BY CONTACTING SAID CYCLIC ACETAL THROUGHOUT ITS MASS WITH GASEOUS OXYGEN, SAID CYCLIC ACETAL CONTAINING A PLURALITY OF 1,3-CYCLIC ACETAL RADICALS WHICH HAVE IN THE 2-POSITION A SUBSTITUENT OF THE CLASS CONSISTING OF VINYL AND ISOPROPENYL RADICALS AND WHICH ARE CONNECTED TO EACH OTHER THROUGH AN INTERPOSED POLYVALENT RADICAL.
Claim 2
Dependent Claim
59 words
THE PROCESS WHICH CONSISTS ESSENTIALLY OF OXYGENATING LIQUID CYCLIC ACETAL BY CONTACTING SAID CYCLIC ACETAL THROUGHOUT ITS MASS WITH GASEOUS OXYGEN, SAID CYCLIC ACETAL CONTAINING A PLURALITY OF 1,3-CYCLIC ACETAL RADICALS WHICH HAVE IN THE 2-POSITION A SUBSTITUENT OF THE CLASS CONSISTING OF VINYL AND ISOPROPENYL RADICALS AND WHICH ARE CONNECTED TO EACH OTHER THROUGH AN INTERPOSED POLYVALENT RADICAL.
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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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |