Patent US2757144A successfully refreshed from Google Patents.
US2746772A
Expired / Lapsed
US
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Pipe guiding ribbed apron for irrigation pipe
Assignee: RACE AND RACE Inc
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Filing: 1953-10-02
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Granted: 1956-05-22
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Expires: 1973-10-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Austin T Race
- 👤 Norman C Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/50; F16L37/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |