Patent US3187402A successfully refreshed from Google Patents.
US3187402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal cartridge manufacture
Assignee: Olin Corp
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Filing: 1963-03-18
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Granted: 1965-06-08
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Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 Albert J Duffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:52
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/02; B21C23/04; B21C23/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THIS METHOD OF MAKING A METAL SHELL PRODUCT CLOSED AT ITS BASE COMPRISING (A) PLACING INTO A ROUND DIE ONE AT A TIME SUBSTANTIALLY UNIFORM ROUND BLANKS OF METAL RECEIVED THEREIN IN CENTERED RELATIONSHIP AND HAVING A COARSE GRAIN IN THE RANGE FROM ABOUT 0.150 MM. TO ABOUT 6.5 MM., (B) PRESSING EACH SAID BLANK BY A RAM HAVING A REDUCED END FORMER CENTRALLY IN THE CLOSED END OF SAID ROUND DIE RECEIVING SAID BLANK AND FORMER AND THEREBY COMPRESSING THE CENTER WHILE SIMULTANEOUSLY REVERSE EXTRUDING THE MARGINAL EDGE OF SAID BLANK TO FORM IN SAID DIE A CUP OF SAID METAL HAVING A CENTRAL BOTTOM COMPRESSIVEDLY COLD WORKED IN SAID DIE TO A REDUCTION OF ABOUT 50 PERCENT TO PRODUCE A SUBSTANTIAL LENGTH OF CYLINDRICAL WALL INTEGRAL WITH THE MARGIN OF SAID BOTTOM, AND THEN (C) PRESSING SAID
Claim 2
Dependent Claim
139 words
THIS METHOD OF MAKING A METAL SHELL PRODUCT CLOSED AT ITS BASE COMPRISING (A) PLACING INTO A ROUND DIE ONE AT A TIME SUBSTANTIALLY UNIFORM ROUND BLANKS OF METAL RECEIVED THEREIN IN CENTERED RELATIONSHIP AND HAVING A COARSE GRAIN IN THE RANGE FROM ABOUT 0.150 MM. TO ABOUT 6.5 MM., (B) PRESSING EACH SAID BLANK BY A RAM HAVING A REDUCED END FORMER CENTRALLY IN THE CLOSED END OF SAID ROUND DIE RECEIVING SAID BLANK AND FORMER AND THEREBY COMPRESSING THE CENTER WHILE SIMULTANEOUSLY REVERSE EXTRUDING THE MARGINAL EDGE OF SAID BLANK TO FORM IN SAID DIE A CUP OF SAID METAL HAVING A CENTRAL BOTTOM COMPRESSIVEDLY COLD WORKED IN SAID DIE TO A REDUCTION OF ABOUT 50 PERCENT TO PRODUCE A SUBSTANTIAL LENGTH OF CYLINDRICAL WALL INTEGRAL WITH THE MARGIN OF SAID BOTTOM, AND THEN (C) PRESSING SAID
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |