US2819192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of aluminum surfaces
Assignee: EIDP Inc
•
Filing: 1955-12-23
•
Granted: 1958-01-07
•
Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
- 👤 James H Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:04
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
THE METHOD OF PRODUCING AN ADHERENT OXIDE FILM ON A CLEAN, OXIDE-FREE ALUMINUM SURFACE COMPRISING EXPOSING SAID SURFACE TO AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE HAVING A PH IN THE RANGE 10.5 TO 11.5.
Claim 2
Independent Claim
34 words
THE METHOD OF PRODUCING AN ADHERENT OXIDE FILM ON A CLEAN, OXIDE-FREE ALUMINUM SURFACE COMPRISING EXPOSING SAID SURFACE TO AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE HAVING A PH IN THE RANGE 10.5 TO 11.5.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |