US3443347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structures made from polyester resin concrete
Assignee: Concrete Development Corp
•
Filing: 1968-03-22
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Granted: 1969-05-13
•
Expires: 1988-03-22
Abstract
No abstract record available.
Inventors
- 👤 William R Varnell
- 👤 Mance R Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:19
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/16; E04B; E04B1/00; E04B1/02; E04B1/12; E04H; E04H7/00; E04H7/22; E04H7/24; E04H7/26; E04H7/28; E04B1/35; E04B2001/3583
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR434715A
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US1360408A
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US1378735A
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US1844497A
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FR680886A
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US1889699A
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US2075872A
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US2281967A
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DE872855C
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US2836529A
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US3078249A
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US3025992A
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US3189568A
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US3171772A
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US3326845A
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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) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |