US3476584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of porcelain enameling metal foils
Assignee: 3M Co
•
Filing: 1966-03-21
•
Granted: 1969-11-04
•
Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Ronald M Randklev
- 👤 Clarence Raymond Humphries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:16
CPC Classifications
C; C23; C23D; C23D3/00; C23D5/00; C23D5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB547532A
Cited
US2580406A
Cited
US2739085A
Cited
US3383225A
Cited
US3222219A
Cited
US3389458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |