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Patent US2912074A successfully refreshed from Google Patents.
US2912074A
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Supporting structure for elevated storage tanks
Assignee: PRODUCTS TANK LINE OF CANADA L
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Filing: 1957-03-25
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Granted: 1959-11-10
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Gram Anker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:45
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/30; E04H12/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1621984A
Cited
FR665969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |