US3284249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decorative finish for copper
Assignee: Atlantic Richfield Co
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Filing: 1963-06-28
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Granted: 1966-11-08
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Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
- 👤 Douald H Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:26
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/48; C23C22/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD OF IMPARTING A DECORATIVE STATUARY BRONZE FINISH TO A CUPREOUS SURFACE WHICH COMPRISES TREATING SAID SURFACE WITH POTASSIUM PERMANGANATE, THEREBY FORMING DISCRETE ADHERENT MICROSCOPIC PARTICLES OF PREDOMINATELY CUPROUS OXIDE UNIFORMLY DISTRIBUTED ON SAID SURFACE AND SPACED APART AT A DISTANCE GREATER THAN THE DIMENSION OF SAID PARTICLES, CONTINUING SAID TREATMENT FOR A CONTROLLED PERIOD OF TIME, WHEREBY SAID OXIDE PARTICLES GROW TO COVER A PREDETERMINED FRACTION OF THE TOTAL AREA OF SAID SURFACE, AND THEREAFTER REACTING SAID OXIDE WITH AN AQUEOUS AMMONICAL SULFIDE SOLUTION WHEREBY A DECORATIVE STATUARY BRONZE FINISH IS PROVIDED ON SAID SURFACE WITH A PREDETERMINED DEPTH OF COLOR.
Claim 2
Independent Claim
103 words
A METHOD OF IMPARTING A DECORATIVE STATUARY BRONZE FINISH TO A CUPREOUS SURFACE WHICH COMPRISES TREATING SAID SURFACE WITH POTASSIUM PERMANGANATE, THEREBY FORMING DISCRETE ADHERENT MICROSCOPIC PARTICLES OF PREDOMINATELY CUPROUS OXIDE UNIFORMLY DISTRIBUTED ON SAID SURFACE AND SPACED APART AT A DISTANCE GREATER THAN THE DIMENSION OF SAID PARTICLES, CONTINUING SAID TREATMENT FOR A CONTROLLED PERIOD OF TIME, WHEREBY SAID OXIDE PARTICLES GROW TO COVER A PREDETERMINED FRACTION OF THE TOTAL AREA OF SAID SURFACE, AND THEREAFTER REACTING SAID OXIDE WITH AN AQUEOUS AMMONICAL SULFIDE SOLUTION WHEREBY A DECORATIVE STATUARY BRONZE FINISH IS PROVIDED ON SAID SURFACE WITH A PREDETERMINED DEPTH OF COLOR.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |