US2843913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a liquid conveying duct
Assignee: Individual
•
Filing: 1956-07-03
•
Granted: 1958-07-22
•
Expires: 1976-07-03
Abstract
No abstract record available.
Inventors
- 👤 Curtis L Barron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:56
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/024; F16L1/028; F16L1/038; E; E03; E03F; E03F3/00; E03F3/04; E03F9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1008264A
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US1148246A
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US1722038A
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US1988900A
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US1942489A
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US2365550A
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US2116746A
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US2616149A
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US2575247A
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US2705360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |