Patent US3827997A successfully refreshed from Google Patents.
Patent US2833043A successfully refreshed from Google Patents.
US2833043A
Expired / Lapsed
US
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Lead block for masons
Assignee: Individual
•
Filing: 1955-02-25
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Granted: 1958-05-06
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Expires: 1975-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Patejdl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:17
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/24; G01C9/34; 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)
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US2529056A
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US2672691A
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US2615253A
Cited
US2728989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |