Patent US3419649A successfully refreshed from Google Patents.
US3419649A
Expired / Lapsed
US
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Method for moulding pipes from cementitious mixes
Assignee: RONALD FRANK KING
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Filing: 1965-04-21
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Granted: 1968-12-31
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Expires: 1985-04-21
Abstract
No abstract record available.
Inventors
- 👤 William D Livingston
- 👤 King Ronald Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:58
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/02; B28B21/10; B28B21/90
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) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |