US3029190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selection of neurotropic viral strains and preparation of vaccines therefrom
Assignee: Individual
•
Filing: 1959-08-04
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Granted: 1962-04-10
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Expires: 1979-08-04
Abstract
No abstract record available.
Inventors
- 👤 Hanson Robert Paul
- 👤 Frank F Piraino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:29
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/12; A61K39/155; A61K39/17; A61K2039/51; A61K2039/525; A61K2039/5254; A61K2039/55; A61K2039/552; C; C12; C12N; C12N2760/00; C12N2760/00011; C12N2760/18011; C12N2760/18111; C12N2760/18134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD OF OBTAINING STRAINS OF NEUTROTROPIC VIRUSES OF LOW VIRULENCE WHICH COMPRISES THE STEPS OF PREPARING AN AQUEOUS SUSPENSION OF NORMAL VERVE CELL TISSUE AND ADDING THERETO NEUROTROPIC VIRAL PARTICLES OF VARYING DEGREES OF VIRULENCE, THE SAID VIRAL PARTICLES HAVING A NEUROTROPIC AFFINITY FOR THE NERVE CELL TISSUE IN SAID SUSPENSION AGITATING THE MIXTURE AND ALLOWING THE VIRAL PARTICLES TO COME IN CONTACT WITH SAID NERVE CELL TISSUE FOR A PERIOD OF TIME RANGING FROM ABOUT 5 MINUTES TO 1 HOUR WHEREBY THE VIRAL PARTICLES HAVING A STRONG AFINITY FOR THE NERVE CELL TISSUR ARE ADSORBED THEREON, REMOVING NERVE CELL TISSUE WITH ADSORBED VIRAL PARTICLES FROM THE AQUEOUS SUSPENSION AND RECOVERING THE NON-ADSORBED VIRAL PARTICLES THEREIN, CONTACTING AGAIN THE UNADSORBED VIRAL PARTICLES WITH NORMAL CELLS AND REPEATING THE PROCESS OF ADSORPTION AND RECOVERY OF NON-ADSORBED VIRAL PARTICLES AT LEAST FIVE TIMES ADN RECOVERING THE NON-ADSORBED VIRAL PARTICLE HAVING LITTLE AFFINITY FOR THE NORMAL NERVE CELL TISSUE.
Claim 2
Independent Claim
157 words
A METHOD OF OBTAINING STRAINS OF NEUTROTROPIC VIRUSES OF LOW VIRULENCE WHICH COMPRISES THE STEPS OF PREPARING AN AQUEOUS SUSPENSION OF NORMAL VERVE CELL TISSUE AND ADDING THERETO NEUROTROPIC VIRAL PARTICLES OF VARYING DEGREES OF VIRULENCE, THE SAID VIRAL PARTICLES HAVING A NEUROTROPIC AFFINITY FOR THE NERVE CELL TISSUE IN SAID SUSPENSION AGITATING THE MIXTURE AND ALLOWING THE VIRAL PARTICLES TO COME IN CONTACT WITH SAID NERVE CELL TISSUE FOR A PERIOD OF TIME RANGING FROM ABOUT 5 MINUTES TO 1 HOUR WHEREBY THE VIRAL PARTICLES HAVING A STRONG AFINITY FOR THE NERVE CELL TISSUR ARE ADSORBED THEREON, REMOVING NERVE CELL TISSUE WITH ADSORBED VIRAL PARTICLES FROM THE AQUEOUS SUSPENSION AND RECOVERING THE NON-ADSORBED VIRAL PARTICLES THEREIN, CONTACTING AGAIN THE UNADSORBED VIRAL PARTICLES WITH NORMAL CELLS AND REPEATING THE PROCESS OF ADSORPTION AND RECOVERY OF NON-ADSORBED VIRAL PARTICLES AT LEAST FIVE TIMES ADN RECOVERING THE NON-ADSORBED VIRAL PARTICLE HAVING LITTLE AFFINITY FOR THE NORMAL NERVE CELL TISSUE.
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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |