Patent US2837820A successfully refreshed from Google Patents.
US2837820A
Expired / Lapsed
US
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Safety razor with clamped blade
Assignee: Individual
•
Filing: 1955-10-03
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Granted: 1958-06-10
•
Expires: 1975-10-03
Abstract
No abstract record available.
Inventors
- 👤 Ostrowski Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:32
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US344114A
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US385462A
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FR5958E
Cited
GB190501099A
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US847782A
Cited
US1158481A
Cited
US1074126A
Cited
US1353603A
Cited
GB273657A
Cited
US2062683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |