US2689204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Culture medium containing bismuthyl polyhydroxy polysulfite
Assignee: Individual
•
Filing: 1952-10-01
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Granted: 1954-09-14
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Expires: 1972-10-01
Abstract
No abstract record available.
Inventors
- 👤 Walter J Nickerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:16
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/14; C12N1/16; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/921; Y10S435/922; Y10S435/924; Y10S435/93; Y10S435/944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A CULTURE MEDIUM FOR THE ISOLATION AND DIFFERENTIATION OF SPECIES OF THE GENUS CANDIDA CONTAINING A BISMUTH SALT, A SOURCE OF NITROGEN, A SOURCE OF ENERGY, A SOURCE OF PHOSPHOROUS, A SOURCE OF ESSENTIAL VITAMINS AND MINERALS, AND A SOLIDIFYING AGENT; THE IMPROVEMENT COMPRISING THE BISMUTH SALT BEING A BISMUTHYL POLYDROXY POLYSULFITE MADE BY THE REACTION OF AN INORGANIC BISMUTH SALT AND SODIUM SULFITE IN A WHOLE NUMBER MOLECULAR RATIO WITHIN THE RANGE OF FROM 1 TO 3 TO 1 TO 6.
Claim 2
Dependent Claim
83 words
IN A CULTURE MEDIUM FOR THE ISOLATION AND DIFFERENTIATION OF SPECIES OF THE GENUS CANDIDA CONTAINING A BISMUTH SALT, A SOURCE OF NITROGEN, A SOURCE OF ENERGY, A SOURCE OF PHOSPHOROUS, A SOURCE OF ESSENTIAL VITAMINS AND MINERALS, AND A SOLIDIFYING AGENT; THE IMPROVEMENT COMPRISING THE BISMUTH SALT BEING A BISMUTHYL POLYDROXY POLYSULFITE MADE BY THE REACTION OF AN INORGANIC BISMUTH SALT AND SODIUM SULFITE IN A WHOLE NUMBER MOLECULAR RATIO WITHIN THE RANGE OF FROM 1 TO 3 TO 1 TO 6.
References Cited (Backward Citations)
No citation records indexed.
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 |