Patent US2653177A successfully refreshed from Google Patents.
US2653177A
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US
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Inhibition of phosphoric acid corrosion
Assignee: California Research LLC
•
Filing: 1949-06-04
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Granted: 1953-09-22
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Expires: 1969-06-04
Abstract
No abstract record available.
Inventors
- 👤 Jacob D Kemp
- 👤 Henry P Zeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:46
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; C; C23; C23F; C23F11/00; C23F11/04; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1809041A
Cited
US2005861A
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GB450668A
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US2135793A
Cited
GB517799A
Cited
US2462638A
Cited
US2482104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |