Patent US2969576A successfully refreshed from Google Patents.
US2969576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous concrete pipe laying machine
Assignee: FULLERFORM CONTINUOUS PIPE CORP
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Filing: 1958-11-12
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Granted: 1961-01-31
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Expires: 1978-11-12
Abstract
No abstract record available.
Inventors
- 👤 Fuller Revilo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:57
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)
US857589A
Cited
US857588A
Cited
US857586A
Cited
US1191731A
Cited
US2324760A
Cited
GB570970A
Cited
US2731698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |