US3758273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for sterilizing polypropylene objects
Assignee: Gillette Co LLC
•
Filing: 1971-04-01
•
Granted: 1973-09-11
•
Expires: 1991-04-01
Abstract
Abstract IF THE STERILIZATION OF POLYPROPYLENE OBJECTS BY IRRADIATION WITH $-RAYS IS CARRIED OUT IN A NON-OXIDIZING (INERT) ATMOSPHERE THE BRITTLENESS AND BREAKDOWN IN THE MOLECULAR WEIGHT OF THE POLYPROPYLENE POLYMER WHICH USUALLY OCCURS AS A RESULT OF THE IRRADIATION IS SUBSTANTIALLY REDUCED. THE RESULTS ARE FURTHER ENHANCED IF THE POLYPROPYLENE OBJECTS ARE STORED IN THE NON-OXIDIZING ATMOSPHERE SUBSEQUENT TO IRRADIATION.
Inventors
- 👤 R Johnston
- 👤 R Clarke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/02; A61L2/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |