US2513189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyvinyl acetals
Assignee: EIDP Inc
•
Filing: 1947-01-18
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Granted: 1950-06-27
•
Expires: 1967-01-18
Abstract
No abstract record available.
Inventors
- 👤 Martin Elmore Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:36
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/327; G03C7/3275; C; C08; C08F; C08F8/00; C08F8/48; C08J; C08J5/00; C08J5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE PROCESS OF MAKING A PLYMERIC COLORFORMER WHICH COMPRISES CONDENSING A COLORFORMER TAKEN FROM THE GROUP CONSISTING OF MONOMERIC COLOR-FORMER ALDEHYDES AND ACETALS THEREOF WITH ALKANOIS OF 1 TO 4 CARBON ATOMS AND 1,2AND 1,3-ALKANEDIOLS OF 2 TO 4 CARBON ATOMS, SAID ALDEHYDES AND ACETALS CONTAINING A COLOR-FORMER NUCLEUS POSSESSING A STRUCTURE OF THE FORMULA:
Claim 2
Dependent Claim
55 words
THE PROCESS OF MAKING A PLYMERIC COLORFORMER WHICH COMPRISES CONDENSING A COLORFORMER TAKEN FROM THE GROUP CONSISTING OF MONOMERIC COLOR-FORMER ALDEHYDES AND ACETALS THEREOF WITH ALKANOIS OF 1 TO 4 CARBON ATOMS AND 1,2AND 1,3-ALKANEDIOLS OF 2 TO 4 CARBON ATOMS, SAID ALDEHYDES AND ACETALS CONTAINING A COLOR-FORMER NUCLEUS POSSESSING A STRUCTURE OF THE FORMULA:
References Cited (Backward Citations)
US2037049A
Cited
US2129450A
Cited
US2269217A
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US2380032A
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US2332896A
Cited
FR873366A
Cited
US2399401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |