US3177558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal articles having smooth hemispheroidal indentations
Assignee: EIDP Inc
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Filing: 1962-08-20
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Granted: 1965-04-13
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Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Gronholz Le Roy Frederick
- 👤 Owens Daniel Kenyon
- 👤 Price Charles Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:14
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/022; B29C59/025; B29C33/00; B29C33/42; B29C33/424; B29C41/00; B29C41/24; B29C43/00; B29C43/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METAL ARTICLE COMPRISING: A BASE METAL HAVING A ROCKWELL HARDNESS OF BETWEEN B85 AND C30 AND A CHROMIUM LAYER NO MORE THAN 0.002 INCH IN THICKNESS PLATED ON SAID BASE METAL, SAID ARTICLE HAVING 2X10**4 TO 12X10**6 RANDOMLY SPACED HEMI-SPHEROIDAL INDENTATIONS PER SQUARE INCH IN THE SURFACE OF SAID ARTICLE SEPARATED BY AREAS OF HIGHLY POLISHED SURFACE HAVING A MIRROR FINISH, SAID IN-
Claim 2
Dependent Claim
64 words
A METAL ARTICLE COMPRISING: A BASE METAL HAVING A ROCKWELL HARDNESS OF BETWEEN B85 AND C30 AND A CHROMIUM LAYER NO MORE THAN 0.002 INCH IN THICKNESS PLATED ON SAID BASE METAL, SAID ARTICLE HAVING 2X10**4 TO 12X10**6 RANDOMLY SPACED HEMI-SPHEROIDAL INDENTATIONS PER SQUARE INCH IN THE SURFACE OF SAID ARTICLE SEPARATED BY AREAS OF HIGHLY POLISHED SURFACE HAVING A MIRROR FINISH, SAID IN-
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |