US3726707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porcelain enameling of steel
Assignee: Motors Liquidation Co
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Filing: 1971-10-04
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Granted: 1973-04-10
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Expires: 1991-10-04
Abstract
Abstract PROCESS FOR THE PORCELAIN ENAMELING OF STEEL INVOLVING ELECTROLESSLY DEPOSITING NICKEL, COBALT AND COPPER ONTO CLEANED, PICKLED AND ETCHED STEEL PRIOR TO ENAMELING.
Inventors
- 👤 D Prosser
- 👤 N Sawdey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:50
CPC Classifications
C; C23; C23D; C23D3/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597; Y10T428/12771; Y10T428/12861; Y10T428/12937
Claims Analysis
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |