US3017723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift-slab construction of buildings
Assignee: Individual
•
Filing: 1958-03-17
•
Granted: 1962-01-23
•
Expires: 1978-03-17
Abstract
No abstract record available.
Inventors
- 👤 Heidenstam Erik Johan Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:10
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/35; E04B1/3511
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1066436A
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US1045774A
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US1444806A
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US2006070A
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US2296863A
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US2531376A
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US2483175A
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FR1133932A
Cited
US2871544A
Cited
FR1109975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |