US2721941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sterilization
Assignee: M & R Dietetic Lab Inc
•
Filing: 1950-10-11
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Granted: 1955-10-25
•
Expires: 1970-10-11
Abstract
No abstract record available.
Inventors
- 👤 Robert C Mcmaster
- 👤 Radcliffe F Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:11
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/02; A61L2/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
THE METHOD OF STERILIZING AND PRESERVING MATERIALS WHICH COMPRISES EXPOSING THEM TO PRIMARY RADIATIONS HAVING WAVE LENGTHS OF FROM 0.05 TO 12 ANGSTROM UNITS AND HAVING AN INTENSITY OF AT LEAST 50,000 ROENTGEN UNITS PER MINUTE PER SQUARE INCH, AND MAINTAINING SAID EXPOSURE UNTIL ALL LIVING ORGANISMS ARE KILLED.
Claim 2
Independent Claim
49 words
THE METHOD OF STERILIZING AND PRESERVING MATERIALS WHICH COMPRISES EXPOSING THEM TO PRIMARY RADIATIONS HAVING WAVE LENGTHS OF FROM 0.05 TO 12 ANGSTROM UNITS AND HAVING AN INTENSITY OF AT LEAST 50,000 ROENTGEN UNITS PER MINUTE PER SQUARE INCH, AND MAINTAINING SAID EXPOSURE UNTIL ALL LIVING ORGANISMS ARE KILLED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |