US3047407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterproofing agents for cement and concrete
Assignee: Individual
•
Filing: 1955-08-17
•
Granted: 1962-07-31
•
Expires: 1975-08-17
Abstract
No abstract record available.
Inventors
- 👤 Ehrenburg Leonid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:43
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)
US22836A
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US171720A
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US288694A
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US1036728A
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US1082035A
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AT69636B
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GB281022A
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US1749923A
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US1957415A
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FR810118A
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GB577954A
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GB606153A
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US2433450A
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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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |