Patent US3773576A successfully refreshed from Google Patents.
US3773576A
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Crystal sketching
Assignee: Marvalaud Inc
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Filing: 1971-06-18
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Granted: 1973-11-20
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Expires: 1991-06-18
Abstract
Abstract Refurbishable works of art are produced on a crystalline metallic surface by forming with plastic deformation an artistic representation, annealing said crystalline surface to relieve the metallic matrix of the imposed energy of plastic deformation in the form of a locally recrystallized surface which is different in crystal grain size and frequently in geometric distribution from the original metallic matrix, and etching said metallic surface to delineate to the eye the pictorial artistic representation composed of crystal grains which are different from those in the contiguous matrix.
Inventors
- 👤 W Pond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:05
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/22; B44C1/221; B44C1/227; C; C23; C23F; C23F1/00; Y; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S148/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
13 words
The process of claim 1 wherein the crystalline metal matrix is on aluminum.
Claim 2
Dependent Claim
14 words
The process of claim 2 wherein the crystalline metal matrix is a single crystal.
Claim 3
Dependent Claim
16 words
The process of claim 3 wherein the single crystal is in the shape of a spheroid.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein the crystalline metal matrix is comprised of a plurality of crystals.
Claim 5
Dependent Claim
16 words
The process of claim 5 wherein the crystalline metal is in the shape of a parallelepiped.
Claim 6
Dependent Claim
22 words
The process of claim 5 wherein at least part of the plastic deformation is along the boundary of at least one crystal.
Claim 7
Dependent Claim
17 words
The process of claim 2 wherein the etching is effected by immersion in a bath of aqua-regia.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |