Patent US2563526A successfully refreshed from Google Patents.
US2563526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of glucopyranose polymers
Assignee: —
•
Filing: —
•
Granted: 1951-08-07
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Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:22
CPC Classifications
C; C08; C08B; C08B37/00; C08B15/00; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
48 words
A PROCESS OF FORMING UNIFORMLY SUBSTITUTED NITROGEN CONTAINING GLUCOPYRANOSE POLYMERS WHICH COMPRISES MIXING GLUCOPYRANOSE POLYMERS WITH A SUBSTITUTED AMMONIUM HYDROXIDE AT A TEMPERATURE IN THE RANGE OF 80* C. TO 115* C. IN A SUBSTANTIALLY NONAQUEOUS SYSTEM WITH PROVISION FOR SUBSTANTIALLY REMOVAL OF WATER FORMED BY THE REACTION.
Claim 2
Dependent Claim
48 words
A PROCESS OF FORMING UNIFORMLY SUBSTITUTED NITROGEN CONTAINING GLUCOPYRANOSE POLYMERS WHICH COMPRISES MIXING GLUCOPYRANOSE POLYMERS WITH A SUBSTITUTED AMMONIUM HYDROXIDE AT A TEMPERATURE IN THE RANGE OF 80* C. TO 115* C. IN A SUBSTANTIALLY NONAQUEOUS SYSTEM WITH PROVISION FOR SUBSTANTIALLY REMOVAL OF WATER FORMED BY THE REACTION.
Claim 3
Dependent Claim
50 words
A NEW COMPOSITION OF MATTER FORMED BY THE REACTION OF GLYCOPYRANOSE POLYMERS IN A SUBSTANTIALLY NON-AQUEOUS SYSTEM AT A TEMPERATURE OF ABOUT 81* C. TO ABOUT 115* C. WITH A SUBSTITUTED AMMONIUM HYDROXIDE AND CONSISTING OF UNIFORMLY SUBSTITUTED GLUCOPYRANOSE POLYMERS SUBSTANTIALLY ALL UNITS OF WHICH HAVE A STRUCTURAL FORMULA OF
Claim 4
Dependent Claim
50 words
A NEW COMPOSITION OF MATTER FORMED BY THE REACTION OF GLYCOPYRANOSE POLYMERS IN A SUBSTANTIALLY NON-AQUEOUS SYSTEM AT A TEMPERATURE OF ABOUT 81* C. TO ABOUT 115* C. WITH A SUBSTITUTED AMMONIUM HYDROXIDE AND CONSISTING OF UNIFORMLY SUBSTITUTED GLUCOPYRANOSE POLYMERS SUBSTANTIALLY ALL UNITS OF WHICH HAVE A STRUCTURAL FORMULA OF
References Cited (Backward Citations)
US1986881A
Cited
US2009015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |