US2917804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming a liquid conveyor duct
Assignee: Individual
•
Filing: 1957-05-15
•
Granted: 1959-12-22
•
Expires: 1977-05-15
Abstract
No abstract record available.
Inventors
- 👤 Curtis L Barron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:25
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/024; F16L1/028; F16L1/038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US485033A
Cited
US1077727A
Cited
US1584756A
Cited
US1722038A
Cited
US2045307A
Cited
US2713983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |