Patent US3427374A successfully refreshed from Google Patents.
US3427374A
Expired / Lapsed
US
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Method of curing cementitious articles
Assignee: Certainteed LLC
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Filing: 1966-09-06
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Granted: 1969-02-11
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Expires: 1986-09-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Jackson
- 👤 Willard R Seipt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:00
CPC Classifications
B; B28; B28B; B28B11/00; B28B11/24; B28B11/245; C; C04; C04B; C04B40/00; C04B40/02
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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |