US3839843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid-steam sterilization
Assignee: Individual
•
Filing: 1973-01-23
•
Granted: 1974-10-08
•
Expires: 1993-01-23
Abstract
Abstract A method for sterilization of containers. A plurality of open containers are heated by superheated steam to above 212*F. in a first heating chamber. The heated containers are then sterilized with an acid-steam mixture at a temperature of about 240* to 300*F. in a second heating chamber. The containers are filled and sealed in a sterile air-steam atmosphere immediately upon leaving said second heating chamber.
Inventors
- 👤 A Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:42
CPC Classifications
B; B65; B65B; B65B55/00; B65B55/02; B65B55/04; B65B55/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A method for aseptic canning of a sterile product comprising the steps, in seriatim, of: a. first preheating a plurality of open containers and sealing lids to a temperature of about 225* to 240*F. under substantially atmospheric pressure; and then b. sterilizing said heated containers and lids by exposing them to an acid-steam mixture maintained at substantially atmospheric pressure and at a temperature in the range of 240* to 300*F. for a period of about 1 to 25 minutes, said mixture having a pH of about 2.8 to 3.2 as measured in the condensate of said acid-steam mixture; and thereafter c. canning said sterile product in a sterile air-steam atmosphere maintained at a pressure 2 to 6 inches of water above atmospheric pressure by filling said open containers with said sterile product, covering said containers with said lids and thereafter sealing said lids to said containers.
Claim 2
Independent Claim
146 words
A method for aseptic canning of a sterile product comprising the steps, in seriatim, of: a. first preheating a plurality of open containers and sealing lids to a temperature of about 225* to 240*F. under substantially atmospheric pressure; and then b. sterilizing said heated containers and lids by exposing them to an acid-steam mixture maintained at substantially atmospheric pressure and at a temperature in the range of 240* to 300*F. for a period of about 1 to 25 minutes, said mixture having a pH of about 2.8 to 3.2 as measured in the condensate of said acid-steam mixture; and thereafter c. canning said sterile product in a sterile air-steam atmosphere maintained at a pressure 2 to 6 inches of water above atmospheric pressure by filling said open containers with said sterile product, covering said containers with said lids and thereafter sealing said lids to said containers.
References Cited (Backward Citations)
US1754251A
Cited
US1593121A
Cited
US1889629A
Cited
US2660513A
Cited
US2685520A
Cited
US2768487A
Cited
US3042533A
Cited
US2950587A
Cited
US3180740A
Cited
US3139323A
Cited
US3576594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |