US3568492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of pressure resistant articles with integral hubs or flanges
Assignee: MOORE CHARLES H JR
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Filing: 1968-11-07
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Granted: 1971-03-09
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Expires: 1988-11-07
Abstract
Abstract TUBE-SHEETS WITH INTEGRAL HUBS, CHANNEL FORGINGS FOR HEAT-EXCHANGERS, PRESSURE VESSELS WITH FLAT HEADS AND SIMILAR ARTICLES WHICH ARE SUBJECTED TO HIGH-PRESSURE ETC. ARE FORMED BY A SERIES OF FORGING STEPS WHICH RESULT IN GREATLY IMPROVED GRAIN ORIENTATION AND, ACCORDINGLY, GREATER RESISTANCE TO PRESSURES.
Inventors
- 👤 Charles H Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:31
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/001; B21J; B21J5/00; B21K; B21K21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |