US2810690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anode backfill
Assignee: Houston Oil Field Material Co Inc
•
Filing: 1950-08-28
•
Granted: 1957-10-22
•
Expires: 1970-08-28
Abstract
No abstract record available.
Inventors
- 👤 Nash O Campise
- 👤 Charles W Scamman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:00
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
AN ANODE BACKFILL FOR CATHODIC PROTECTION OF BURIED CORRODIBLE STRUCTURES COMPRISING, A MAJOR PORTION OF GYPSUM, A MINOR PROTION OF BENTONITE AND NOT SUBSTANTIALLY EXCEEDING 10 PERCENT BY WEIGHT OF A MIXTURE OF HYDRATED ALKALINE EARTH OXIDE AND ALKALINE METAL CARBONATE IN SUBSTANTIALLY MOLCULAR PROPORTIONS.
Claim 2
Dependent Claim
45 words
AN ANODE BACKFILL FOR CATHODIC PROTECTION OF BURIED CORRODIBLE STRUCTURES COMPRISING, A MAJOR PORTION OF GYPSUM, A MINOR PROTION OF BENTONITE AND NOT SUBSTANTIALLY EXCEEDING 10 PERCENT BY WEIGHT OF A MIXTURE OF HYDRATED ALKALINE EARTH OXIDE AND ALKALINE METAL CARBONATE IN SUBSTANTIALLY MOLCULAR PROPORTIONS.
References Cited (Backward Citations)
US1342148A
Cited
US2480087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |