US2689244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of chitin sulfate
Assignee: Phillips Petroleum Co
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Filing: 1950-06-23
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Granted: 1954-09-14
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Expires: 1970-06-23
Abstract
No abstract record available.
Inventors
- 👤 Rufus V Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:24
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; C08B37/0027; C08B37/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR PRODUCING A METAL CHITIN SULFATE WHICH COMPRISES REACTING CHITIN WITH A METAL ION-YIELDING MATERIAL AND A SULFATING AGENT CONSISTING OF A COMPLEX SULFUR TRIOXIDE WITH AN ORGANIC RADICAL SELECTED FROM THE GROUP CONSISTING OF PYRIDINE, DIOXANE, N,N-DIMETHYLANILINE, AND B,B''-DICHLORODIETHYL ETHER, IN THE PRESENCE OF A TERTIARY AMINE SOLVENT.
Claim 2
Dependent Claim
51 words
A PROCESS FOR PRODUCING A METAL CHITIN SULFATE WHICH COMPRISES REACTING CHITIN WITH A METAL ION-YIELDING MATERIAL AND A SULFATING AGENT CONSISTING OF A COMPLEX SULFUR TRIOXIDE WITH AN ORGANIC RADICAL SELECTED FROM THE GROUP CONSISTING OF PYRIDINE, DIOXANE, N,N-DIMETHYLANILINE, AND B,B''-DICHLORODIETHYL ETHER, IN THE PRESENCE OF A TERTIARY AMINE SOLVENT.
References Cited (Backward Citations)
CH156308A
Cited
CH156307A
Cited
US2212521A
Cited
GB475235A
Cited
US2335193A
Cited
US2386693A
Cited
US2508433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |