US2633781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for road construction
Assignee: Individual
•
Filing: 1948-01-30
•
Granted: 1953-04-07
•
Expires: 1968-01-30
Abstract
No abstract record available.
Inventors
- 👤 William P Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:32
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/30; E01C19/34; E01C19/38; Y; Y10; Y10S; Y10S37/00; Y10S37/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2223024A
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US2223733A
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US2269110A
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US2261491A
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US2261766A
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US2293962A
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US2332687A
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US2412398A
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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) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |