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US2952028A
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Trowel and guard therefor
Assignee: LOUIS G ERNSTER
•
Filing: 1957-09-26
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Granted: 1960-09-13
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Expires: 1977-09-26
Abstract
No abstract record available.
Inventors
- 👤 Roy F Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:04
CPC Classifications
E; E04; E04F; E04F21/00; E04F21/02; E04F21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1078122A
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US1154453A
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US1761109A
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US2184827A
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US2190811A
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US2259653A
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US2537482A
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US2556983A
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US2819484A
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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) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |