US2690579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toothbrush
Assignee: Individual
•
Filing: 1951-01-12
•
Granted: 1954-10-05
•
Expires: 1971-01-12
Abstract
No abstract record available.
Inventors
- 👤 Robert G Backstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:56
CPC Classifications
A; A46; A46B; A46B9/00; A46B9/02; A46B9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US28794A
Cited
US306776A
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US335345A
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GB189619408A
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US758764A
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US958371A
Cited
US1500722A
Cited
FR558864A
Cited
US2130661A
Cited
US2274042A
Cited
US2304319A
Cited
US2483503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |