Patent US2121929A successfully refreshed from Google Patents.
US3138078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Road substructure construction
Assignee: Individual
•
Filing: 1961-02-28
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Granted: 1964-06-23
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Expires: 1981-02-28
Abstract
No abstract record available.
Inventors
- 👤 Nojima Takeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:48
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/08; E01; E01C; E01C3/00; E01C3/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A ROAD SUBSTRUCTURE COMPRISING ROWS AND ARRAYS OF INVERTED CONICAL HOLES FORMED IN THE GROUND WITH PREDETERMINED SPACINGS THEREBETWEEN, METAL SLEEVES OF FRUSTO-CONICAL SHAPES OPEN AT BOTH ENDS AND FORMING LININGS OF SAID HOLES, RESPECTIVELY, AND CONCRETE BODIES FILLING UP SAID CONICAL HOLES LINED WITH SAID METAL SLEEVES, RESPECTIVELY.
Claim 2
Dependent Claim
49 words
A ROAD SUBSTRUCTURE COMPRISING ROWS AND ARRAYS OF INVERTED CONICAL HOLES FORMED IN THE GROUND WITH PREDETERMINED SPACINGS THEREBETWEEN, METAL SLEEVES OF FRUSTO-CONICAL SHAPES OPEN AT BOTH ENDS AND FORMING LININGS OF SAID HOLES, RESPECTIVELY, AND CONCRETE BODIES FILLING UP SAID CONICAL HOLES LINED WITH SAID METAL SLEEVES, RESPECTIVELY.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |