US2919489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mason's chalk line holder
Assignee: Individual
•
Filing: 1955-11-29
•
Granted: 1960-01-05
•
Expires: 1975-11-29
Abstract
No abstract record available.
Inventors
- 👤 Espinosa William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:56
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/14; E04G21/16; E04G21/18; E04G21/1808; E04G21/1825
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1605979A
Cited
US173502A
Cited
US434237A
Cited
US133299A
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US1876473A
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US903380A
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US927790A
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US1094286A
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GB194146A
Cited
US2030539A
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US2508076A
Cited
DE806145C
Cited
US2611963A
Cited
US2659973A
Cited
US2647321A
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US2665487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |