US3433657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of alkali-aggregate reactions in concrete
Assignee: SCHWEIZERISCHE METALLWERKE SELVE AG NO 1 SCHEIBENSTRASSE 3600 THUN SWITZERLAND
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Filing: 1964-11-19
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Granted: 1969-03-18
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Expires: 1984-11-19
Abstract
No abstract record available.
Inventors
- 👤 Ritha Edva Pickering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:08
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1534240A
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GB281022A
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GB405508A
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US2203302A
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US3047407A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |