Patent DE872276C successfully refreshed from Google Patents.
Patent US3429094A successfully refreshed from Google Patents.
US3429094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-phase concrete and steel material
Assignee: Battelle Development Corp
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Filing: 1965-07-07
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Granted: 1969-02-25
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Expires: 1985-07-07
Abstract
No abstract record available.
Inventors
- 👤 James P Romualdi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:08
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/01; E04C5/012; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/109; Y10T442/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1389942A
Cited
GB252975A
Cited
US1624389A
Cited
US1633219A
Cited
GB303406A
Cited
GB515003A
Cited
US2677955A
Cited
GB799860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |