US3340101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoforming of metals
Assignee: International Business Machines Corp
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Filing: 1965-04-02
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Granted: 1967-09-05
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Expires: 1985-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Davis S Fields
- 👤 Daniel L Mehl
- 👤 Bernard F Addis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:46
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/053; B21D26/055; C; C22; C22F; C22F1/00; C22F1/006; C22F1/16; C22F1/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN A METHOD OF MAKING METALLIC FORMS, THE IMPROVED PROCESS COMPRISING THE STEPS OF: PROVIDING BLANK METAL OF A COMPOSITION OF, BY WEIGHT, APPROXIMATELY 78% ZINC AND 22% ALUMINUM AND FORMED TO PROVIDE TWO OPPOSED PRINCIPAL SURFACES, HOLDING SAID BLANK METAL AT A TEMPERATURE IN EXCESS OF 600*F. AT LEAST ONE HOUR, QUENCHING SAID BLANK METAL TO A METASTABLE STATE, PROVIDING A SHAPING MEMBER HAVING A SURFACE FORMED COMPLEMENTARY TO THE SHAPE DESIRED TO BE FORMED, HEATING SAID BLANK METAL TO A TEMPERATURE SUBSTANTIALLY BETWEEN 500*F. AND 520*F., POSITIONING SAID BLANK METAL WITH ITS OPPOSED PRINCIPAL SURFACES IN OPERATIVE PROJECTION WITH RESPECT TO SAID SHAPING MEMBER, EFFECTIVELY CONSTRAINING SAID BLANK METAL ABOUT A CLOSED PERPHERY CIRCUMSCRIBING AT LEAST SOME SURFACE PORTION OF SAID BLANK METAL, AND INDUCING TENSILE STRESS IN THE CIRCUMSCRIBED PORTION OF SAID BLANK METAL BY APPLYING TRANSVERSE FORCE THERETO THROUGH A FLUID INTERFACE FO A SUBSTANTIAL PERIOD OF TIME INVERSELY RELATED TO THE INDUCED TENSILE STRESS CAUSING SAID BLANK TO DEFORM AGAINST AND INTO INTIMATE CONTACT WITH SAID SHAPING MEMBER SURFACE.
Claim 2
Dependent Claim
174 words
IN A METHOD OF MAKING METALLIC FORMS, THE IMPROVED PROCESS COMPRISING THE STEPS OF: PROVIDING BLANK METAL OF A COMPOSITION OF, BY WEIGHT, APPROXIMATELY 78% ZINC AND 22% ALUMINUM AND FORMED TO PROVIDE TWO OPPOSED PRINCIPAL SURFACES, HOLDING SAID BLANK METAL AT A TEMPERATURE IN EXCESS OF 600*F. AT LEAST ONE HOUR, QUENCHING SAID BLANK METAL TO A METASTABLE STATE, PROVIDING A SHAPING MEMBER HAVING A SURFACE FORMED COMPLEMENTARY TO THE SHAPE DESIRED TO BE FORMED, HEATING SAID BLANK METAL TO A TEMPERATURE SUBSTANTIALLY BETWEEN 500*F. AND 520*F., POSITIONING SAID BLANK METAL WITH ITS OPPOSED PRINCIPAL SURFACES IN OPERATIVE PROJECTION WITH RESPECT TO SAID SHAPING MEMBER, EFFECTIVELY CONSTRAINING SAID BLANK METAL ABOUT A CLOSED PERPHERY CIRCUMSCRIBING AT LEAST SOME SURFACE PORTION OF SAID BLANK METAL, AND INDUCING TENSILE STRESS IN THE CIRCUMSCRIBED PORTION OF SAID BLANK METAL BY APPLYING TRANSVERSE FORCE THERETO THROUGH A FLUID INTERFACE FO A SUBSTANTIAL PERIOD OF TIME INVERSELY RELATED TO THE INDUCED TENSILE STRESS CAUSING SAID BLANK TO DEFORM AGAINST AND INTO INTIMATE CONTACT WITH SAID SHAPING MEMBER SURFACE.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |