Patent US3061447A successfully refreshed from Google Patents.
US3061447A
Expired / Lapsed
US
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Method of producing a corrosion resistant internal surface on a container made of light metal
Assignee: Schmidding Wilhelm GmbH and Co Firma
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Filing: 1959-05-22
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Granted: 1962-10-30
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Expires: 1979-05-22
Abstract
No abstract record available.
Inventors
- 👤 Brenner Paul
- 👤 Kraus Franz
- 👤 Schulte Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:02
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23C; C23C22/00; C23C22/78; C23F3/03; C25; C25D; C25D11/00; C25D11/02; C25D11/04; Y; Y10; Y10S; Y10S220/00; Y10S220/917
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
A BEER BARREL HAVING AN INNER WALL CONSISTING ESSENTIALLY OF A LIGHT METAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM ALLOYS AND HAVING A SMOOTH LUSTRED FREE SURFACE; AN OXIDE FILM FORMED ON AND COVERING SAID SURFACE; AND A VARNISH COATING COVERING SAID OXIDE FILM.
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) | 1965-10-29 | 1966-04-30 | 1966-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-29 | 1970-04-30 | 1970-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-29 | 1974-04-30 | 1974-10-30 | $7700.00 | Window Closed / Lapsed |