US3546830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated reinforced concrete flooring slabs and floors as thus formed
Assignee: TRAVAUX POUR LA CONSTRUCTION E
•
Filing: 1968-02-13
•
Granted: 1970-12-15
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Expires: 1988-02-13
Abstract
No abstract record available.
Inventors
- 👤 Michel Jean-Charles Villaneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:59
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B5/00; E04B5/02; E04B5/04; E04B5/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA586557A
Cited
FR464415A
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US1514714A
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US1495896A
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US1554144A
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US1764134A
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US1959816A
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US2008370A
Cited
US2171338A
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US2294554A
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GB827035A
Cited
US2984312A
Cited
US3263378A
Cited
CH411294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |