Patent US2625569A successfully refreshed from Google Patents.
US2625569A
Expired / Lapsed
US
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Trioxepane polymers
Assignee: EIDP Inc
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Filing: 1948-10-07
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Granted: 1953-01-13
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Expires: 1968-10-07
Abstract
No abstract record available.
Inventors
- 👤 William F Gresham
- 👤 Clarence D Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:46
CPC Classifications
C; C08; C08G; C08G6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR THE PREPARATION OF POLYMERIC 1,3,5-TRIOXEPANE WHICH COMPRISES MIXING 1,3DIOXOLANE AND AN ALDEHYDE, HEATING, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AT LEAST 1/4 MOLE OF 1,3-DIOXOLANE PER MOLE OF THE ALDEHYDE AS A COMPOUND OF THE GROUP CONSISTING OF FORMALDEHYDE, PARAFORMALDEHYDE, AND TRIOXANE IN THE PRESENCE OF AN ACIDIC CONDENSATION CATALYST, AND THEREAFTER NEUTRALIZING THE CATALYST, AND SEPARATING THE 1,3,5-TRIOXEPANE FROM THE POLYMERIC 1,3,5TRIOAXEPANE.
Claim 2
Dependent Claim
64 words
A PROCESS FOR THE PREPARATION OF POLYMERIC 1,3,5-TRIOXEPANE WHICH COMPRISES MIXING 1,3DIOXOLANE AND AN ALDEHYDE, HEATING, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AT LEAST 1/4 MOLE OF 1,3-DIOXOLANE PER MOLE OF THE ALDEHYDE AS A COMPOUND OF THE GROUP CONSISTING OF FORMALDEHYDE, PARAFORMALDEHYDE, AND TRIOXANE IN THE PRESENCE OF AN ACIDIC CONDENSATION CATALYST, AND THEREAFTER NEUTRALIZING THE CATALYST, AND SEPARATING THE 1,3,5-TRIOXEPANE FROM THE POLYMERIC 1,3,5TRIOAXEPANE.
References Cited (Backward Citations)
US2350350A
Cited
US2473994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |