Patent US2653931A successfully refreshed from Google Patents.
US2653931A
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Process for labeling polysaccharides with c14 and products resulting therefrom
Assignee: Individual
•
Filing: 1951-04-25
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Granted: 1953-09-29
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Expires: 1971-04-25
Abstract
No abstract record available.
Inventors
- 👤 Horace S Isbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:33
CPC Classifications
C; C08; C08B; C08B37/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
A PROCESS FOR THE PREPARATION OF C14-LABELED POLYSACCHARIDES WHICH CONSISTS IN REACTING A POLYSACCHARIDE WITH C14-LABELED CYANIDE, SAPONIFYING THE RESULTING NITRILE AND ISOLATING THE RADIOACTIVE POLYSACCHARDE DERIVATIVE.
References Cited (Backward Citations)
US1057437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |