US2999711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-skid sanding device
Assignee: Individual
•
Filing: 1959-04-24
•
Granted: 1961-09-12
•
Expires: 1979-04-24
Abstract
No abstract record available.
Inventors
- 👤 Leonard J Sturmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:07
CPC Classifications
B; B60; B60B; B60B39/00; B60B39/02; B60B39/04; B60B39/08; B60B39/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1497198A
Cited
US1625746A
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US1975346A
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US2223722A
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US2626823A
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US2672361A
Cited
US2725247A
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US2722441A
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US2863687A
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US2933337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |