Patent US3238610A successfully refreshed from Google Patents.
US3238610A
Expired / Lapsed
US
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Method of preparing and fluid pressure forming welded blanks
Assignee: Northrop Grumman Guidance and Electronics Co Inc
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Filing: 1964-04-13
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Granted: 1966-03-08
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Expires: 1984-04-13
Abstract
No abstract record available.
Inventors
- 👤 John W Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:29
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/053; B21D26/057; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49995; Y10T29/49996
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE PROCESS FOR FORMING SHEET MATERIAL ARTICLES OF CURVED CONFIGURATION WHICH COMPRISES THE STEPS OF: FORMED A PLURALITY OF INTERRELATED SECTIONS OF SHEET MATERIAL; REDUCNG THE CENTRAL PORTION OF EACH SECTION TO LEAVE THICKENED EDGE PORTIONS; BONDING THE SECTION TOGETHER AT SAID EDGE PORTIONS TO FORM A HOLLOW OPEN ENDED BLANK, SECURING THE FLANGE ON THE OPEN END OF SAID BLANK; AND APPLYING FLUID PRESSURE TO THE INTERIOR OF SAID BLANK TO EXPAND IT TO FINISHED FORM WHILE BEING HELD BY SAID FLANGE.
Claim 2
Dependent Claim
83 words
THE PROCESS FOR FORMING SHEET MATERIAL ARTICLES OF CURVED CONFIGURATION WHICH COMPRISES THE STEPS OF: FORMED A PLURALITY OF INTERRELATED SECTIONS OF SHEET MATERIAL; REDUCNG THE CENTRAL PORTION OF EACH SECTION TO LEAVE THICKENED EDGE PORTIONS; BONDING THE SECTION TOGETHER AT SAID EDGE PORTIONS TO FORM A HOLLOW OPEN ENDED BLANK, SECURING THE FLANGE ON THE OPEN END OF SAID BLANK; AND APPLYING FLUID PRESSURE TO THE INTERIOR OF SAID BLANK TO EXPAND IT TO FINISHED FORM WHILE BEING HELD BY SAID FLANGE.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |