Patent US3335646A successfully refreshed from Google Patents.
US3335646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sidewalk paving machine
Assignee: Individual
•
Filing: 1965-06-30
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Granted: 1967-08-15
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Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 Charles A Crayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:57
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4806; E01C19/4826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN A SPREADING AND COMPRISING MACHINE SUPPORTING A SCREED, THE COMBINATION OF: (1) A TRANSVERSE GUIDE PLATE ATTACHED TO THE TOP OF THE SCREED; (2) A TRANSVERSE RAIL ATTACHED TO THE SCREED AND SPACED DOWNWARD FROM THE GUIDE PLATE SO AS TO FORM AN UPPER CHANNEL; (3) A SCREED EXTENSION HAVING A TAPERING RAIL ENGAGEABLE IN SAID UPPER CHANNEL AND HAVING ITS BOTTOM SURFACE AT THE SAME LEVEL AS THE BOTTOM SURFACE OF THE MAIN SCREED; AND (4) MEANS FOR HOLDING THE SCREED EXTENSION IN A SELECTED LONGITUDINAL POSITION.
Claim 2
Dependent Claim
89 words
IN A SPREADING AND COMPRISING MACHINE SUPPORTING A SCREED, THE COMBINATION OF: (1) A TRANSVERSE GUIDE PLATE ATTACHED TO THE TOP OF THE SCREED; (2) A TRANSVERSE RAIL ATTACHED TO THE SCREED AND SPACED DOWNWARD FROM THE GUIDE PLATE SO AS TO FORM AN UPPER CHANNEL; (3) A SCREED EXTENSION HAVING A TAPERING RAIL ENGAGEABLE IN SAID UPPER CHANNEL AND HAVING ITS BOTTOM SURFACE AT THE SAME LEVEL AS THE BOTTOM SURFACE OF THE MAIN SCREED; AND (4) MEANS FOR HOLDING THE SCREED EXTENSION IN A SELECTED LONGITUDINAL POSITION.
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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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |