US2607765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of polyvinyl alcohol with boric acid
Assignee: EIDP Inc
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Filing: 1949-12-05
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Granted: 1952-08-19
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Expires: 1969-12-05
Abstract
No abstract record available.
Inventors
- 👤 Edward P Czerwin
- 👤 Lynden D Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:06
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE PROCESS WHICH COMPRISES DISPERSING A FINELY DIVIDED POLYVINYL ALCOHOL AND FINELY DIVIDED BORIC ACID IN AN ORGANIC LIQUID IN WHICH BOTH ARE INSOLUBLE AND ADDING A BORIC ACID SOLVENT TO THE RESULTING DISPERSION IN AMOUNT SUFFICIENT TO CAUSE THE FORMATION OF A PARTICULATE REACTION PRODUCT.
Claim 2
Dependent Claim
46 words
THE PROCESS WHICH COMPRISES DISPERSING A FINELY DIVIDED POLYVINYL ALCOHOL AND FINELY DIVIDED BORIC ACID IN AN ORGANIC LIQUID IN WHICH BOTH ARE INSOLUBLE AND ADDING A BORIC ACID SOLVENT TO THE RESULTING DISPERSION IN AMOUNT SUFFICIENT TO CAUSE THE FORMATION OF A PARTICULATE REACTION PRODUCT.
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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |