US3046647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating hemispherical multi-layer heads
Assignee: AO Smith Corp
•
Filing: 1959-03-03
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Granted: 1962-07-31
•
Expires: 1979-03-03
Abstract
No abstract record available.
Inventors
- 👤 Fred A Carstens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:22
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/24; F; F16; F16L; F16L41/00; F16L41/08; F16L41/082; F16L41/084; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49826; Y10T29/49863; Y10T29/49893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1929118A
Cited
US2337247A
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US2372723A
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US2359446A
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US2503191A
Cited
US2715377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |