US3377683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a heat exchanger
Assignee: Olin Corp
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Filing: 1965-08-24
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Granted: 1968-04-16
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Expires: 1985-08-24
Abstract
No abstract record available.
Inventors
- 👤 Lester J Tranel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:42
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; F; F25; F25B; F25B39/00; F25B39/02; F25B39/022; F25B39/024; F25B2400/00; F25B2400/05; F25B2400/052; G; G05; G05B; G05B2219/00; G05B2219/30; G05B2219/50; G05B2219/50334; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49369; Y10T29/49371
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A METHOD OF FORMING TO A DESIRED CONFIGURATION AN EXPANDED PASSAGEWAY WITHIN A PANEL, SAID PASSAGEWAY HAVING OPPOSED SIDES OF MATERIALS OF DIFFERENT HARDNESS, THE METHOD COMPRISING (A) REDUCING THE THICKNESS OF SAID PANEL AT AREAS ON EACH SIDE OF SAID PASSAGEWAY TO CAUSE THE PASSAGEWAY TO BE FURTHER EXPANDED, AND (B) INSERTING INTO SAID PASSAGEWAY A TOOL HAVING THE DESIRED CONFIGURATION TO FORM SAID PASSAGEWAY ILNTO THE DESIRED CONFIGURATION.
Claim 2
Independent Claim
70 words
A METHOD OF FORMING TO A DESIRED CONFIGURATION AN EXPANDED PASSAGEWAY WITHIN A PANEL, SAID PASSAGEWAY HAVING OPPOSED SIDES OF MATERIALS OF DIFFERENT HARDNESS, THE METHOD COMPRISING (A) REDUCING THE THICKNESS OF SAID PANEL AT AREAS ON EACH SIDE OF SAID PASSAGEWAY TO CAUSE THE PASSAGEWAY TO BE FURTHER EXPANDED, AND (B) INSERTING INTO SAID PASSAGEWAY A TOOL HAVING THE DESIRED CONFIGURATION TO FORM SAID PASSAGEWAY ILNTO THE DESIRED CONFIGURATION.
Claim 3
Independent Claim
40 words
A METHOD OF FABRICATING A HOLLOW PANEL HAVING OPPOSED SIDES OF DIFFERENT HARDNESS AND AN INTERNAL PASSAGEWAY OF A DESIREDE CONFIGURATION, COMPRISING (A) SUPERIMPOSING A FIRST SHEET UPON A SECOND SHEET, SAID FIRST AND SECOND SHEET BEING OF DIFFERENT HARDNESS,
Claim 4
Independent Claim
40 words
A METHOD OF FABRICATING A HOLLOW PANEL HAVING OPPOSED SIDES OF DIFFERENT HARDNESS AND AN INTERNAL PASSAGEWAY OF A DESIREDE CONFIGURATION, COMPRISING (A) SUPERIMPOSING A FIRST SHEET UPON A SECOND SHEET, SAID FIRST AND SECOND SHEET BEING OF DIFFERENT HARDNESS,
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) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |