Patent US3402228A successfully refreshed from Google Patents.
US3402228A
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US
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Methods for producing molded walls and molded walls produced thereby
Assignee: HOWARD O WOOD
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Filing: 1965-04-14
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Granted: 1968-09-17
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Expires: 1985-04-14
Abstract
No abstract record available.
Inventors
- 👤 Robert L Wood
- 👤 Howard O Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:49
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B2111/00; C04B2111/00474; C04B2111/00612; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
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) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |