Patent US3763542A successfully refreshed from Google Patents.
US3763542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short run production tool
Assignee: ThyssenKrupp Budd Co
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Filing: 1970-12-18
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Granted: 1973-10-09
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Expires: 1990-12-18
Abstract
Abstract A method of forming a polymer impregnated concrete tool, such as a punch, includes the steps of pouring the concrete in a negative casting. Steps are taken while the concrete is still soft to assure that the tool attachments are properly aligned. The concrete is then cured and monomer is added under pressure. The impregnated tool is then put in a polymer monomer solution and polymerized.
Inventors
- 👤 L Gutnajer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:28
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/20; B23; B23P; B23P15/00; B23P15/28; B23P17/00; B23P17/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
A method as set forth in claim 1 wherein additional steps are provided for making said negative casting, said additional steps including providing holding means, inserting a model into said holding means, pouring plaster into said holding means around said model, allowing said plaster to harden, leveling the exposed surface of said plaster, removing said model to provide said negative casting of said tool to be formed.
Claim 2
Dependent Claim
42 words
A method as set forth in claim 2 wherein the additional steps are provided of inverting the negative casting prior to pouring said concrete, and using the leveled surface of said plaster as said predetermined reference level for aligning said plate member.
Claim 3
Dependent Claim
28 words
A method as set forth in claim 3 wherein an additional step is provided of attaching said plate member with said concrete to a ram of a machine.
References Cited (Backward Citations)
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |