US2671573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tank construction
Assignee: KNOCK DOWN TANKS Inc
•
Filing: 1949-09-28
•
Granted: 1954-03-09
•
Expires: 1969-09-28
Abstract
No abstract record available.
Inventors
- 👤 Harry H Hendon
- 👤 Howard A Van Orman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:41
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1376216A
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US643787A
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FR544533A
Cited
US1451967A
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US1432075A
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US1866979A
Cited
US2091731A
Cited
US2134678A
Cited
US2233093A
Cited
US2219289A
Cited
US2300259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |