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Patent US2478478A successfully refreshed from Google Patents.
US2478478A
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Potential gradient anode for galvanic protection
Assignee: Dow Chemical Co
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Filing: 1947-02-03
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Granted: 1949-08-09
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Expires: 1967-02-03
Abstract
No abstract record available.
Inventors
- 👤 John J Grebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:20
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23F13/08; C23F13/12; C23F13/14; C23F13/16; C23F2213/00; C23F2213/20; C23F2213/22; C23F2213/30; C23F2213/32; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/931; Y10S428/933; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12493; Y10T428/12729; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12986
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2011613A
Cited
US2204823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |