US3822998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting tin-packings against corrosion and making them glossy
Assignee: Gdańsk University of Technology
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Filing: 1972-06-30
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Granted: 1974-07-09
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Expires: 1992-06-30
Abstract
Abstract TIN-PACKING, I.E. TIN-CANS FOR FOOD ARE PROTECTED AGAINST CORROSION AND MADE GLOSSY AT THE SAME TIME BY A METHOD IN WHICH A TIN-PACKING IS TREATED WITH A MIXTURE OF INORGANIC AND ORGANIC CORROSION INHIBITORS HAVING A COMMON ANION AND HAVING A SYNERGISTIC EFFECT TOGETHER WITH WASHING AND BRIGHTENING AGENTS.
Inventors
- 👤 R Juchniewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:32
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |