US3452406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming concrete articles
Assignee: Blaw Knox Ltd
•
Filing: 1966-02-25
•
Granted: 1969-07-01
•
Expires: 1986-02-25
Abstract
No abstract record available.
Inventors
- 👤 John Guy David Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:13
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4833
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US166104A
Cited
US1292250A
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US2225015A
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US3145444A
Cited
US3176371A
Cited
US3200177A
Cited
US3274906A
Cited
US3281903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |