US3589861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced pressure process of sterilization
Assignee: American Sterilizer Co
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Filing: 1968-05-20
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Granted: 1971-06-29
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Expires: 1988-05-20
Abstract
Abstract THE PROCESS DISCLOSED HEREIN DEALS WITH STERILIZING GOODS PACKAGE OF SEMI-PERMEABLE CONTAINERS IN A PERMEABLE GAS (ETHYLENE OXIDE). AN IMPERMEABLE GAS IS ADDED TO THE ATMOSPHERE OF PERMEABLE GAS AND THIS OVER-PRESSURE OF THE IMPERMEABLE GAS IS USED TO CONFINE THE PACKAGE SO THAT NO SWELLING OF THE PACKAGE CAN OCCUR. AIR MAY BE USED AS THE IMPERMEABLE GAS TO PROVIDE THE CONFINING OVERPRESSUR. THIS CONFINING PRESSURE BALANCES THE EFFECT OF THE PARTIAL PRESSURE OF THE PERMEATED GAS WITHIN THE PACKAGE SO THAT THE PACKAGE CANNOT INFLATES BEYOND IT ORIGINAL SIZE.
Inventors
- 👤 Donald A Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:27
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/20; A61L2/206
Claims Analysis
Total Claims: 0
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |