Patent US3069772A successfully refreshed from Google Patents.
US3069772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric dry shaver head with changeable cutting heads of varying sharpness
Assignee: US Philips Corp
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Filing: 1959-04-14
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Granted: 1962-12-25
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Expires: 1979-04-14
Abstract
No abstract record available.
Inventors
- 👤 Roessing Lothar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:42
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2116229A
Cited
US2229958A
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US2223310A
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US2335413A
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US2372401A
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US2629169A
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US2590619A
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US2574317A
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US2780864A
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US2838836A
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GB784909A
Cited
US2824367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |