Patent US4004892A successfully refreshed from Google Patents.
US4004892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cookware fabricated from composites of copper,aluminum and stainless steel
Assignee: Clad Metals LLC
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Filing: 1975-04-29
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Granted: 1976-01-25
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Expires: 1995-04-29
Abstract
No abstract record available.
Inventors
- 👤 John B Ulam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/22; A; A47; A47J; A47J36/00; A47J36/02; B23K35/00; B23K35/001; B23K35/004; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3064112A
Cited
US3112185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-24 | 1987-07-26 | 1988-01-25 | $7700.00 | Window Closed / Lapsed |