Patent US3879009A successfully refreshed from Google Patents.
US3879009A
Expired / Lapsed
US
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Mold for making objects
Assignee: Gould Inc
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Filing: 1973-05-16
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Granted: 1975-04-22
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Expires: 1993-05-16
Abstract
Abstract A mold for forming objects such as battery grids includes a cavity having a titanium layer with an adherent titanium oxide layer integrally formed thereon. The oxide layer is formed by heating the titanium layer under controlled oxidizing conditions to provide an oxide layer of a specified thickness which is tenaciously adherent to the unoxidized titanium.
Inventors
- 👤 George W Mao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:54
CPC Classifications
B; B22; B22C; B22C23/00; B22C23/02; B22C3/00; B22D; B22D17/00; B22D17/20; B22D17/22; B22D17/2209
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
51 words
A mold for forming objects from a fluid which comprises a cavity in the shape of the object to be formed having at least a surface facing of titanium and an integral adherent oxide layer thereon of a thickness sufficient to satisfy the heat insulating requirements for the objects being formed.
Claim 2
Dependent Claim
51 words
A mold for forming objects from a fluid which comprises a cavity in the shape of the object to be formed having at least a surface facing of titanium and an integral adherent oxide layer thereon of a thickness sufficient to satisfy the heat insulating requirements for the objects being formed.
Claim 3
Dependent Claim
51 words
A mold for forming objects from a fluid which comprises a cavity in the shape of the object to be formed having at least a surface facing of titanium and an integral adherent oxide layer thereon of a thickness sufficient to satisfy the heat insulating requirements for the objects being formed.
Claim 4
Dependent Claim
51 words
A mold for forming objects from a fluid which comprises a cavity in the shape of the object to be formed having at least a surface facing of titanium and an integral adherent oxide layer thereon of a thickness sufficient to satisfy the heat insulating requirements for the objects being formed.
Claim 5
Dependent Claim
21 words
The mold of claim 1 wherein the titanium oxide layer has a thickness of from about 0.25 to about 0.5 mil.
Claim 6
Dependent Claim
12 words
The mold of claim 2 wherein the mold is formed of titanium.
References Cited (Backward Citations)
US3136011A
Cited
US3446643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |