US3224899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wettable polyurethane sponge
Assignee: Individual
•
Filing: 1961-08-17
•
Granted: 1965-12-21
•
Expires: 1981-08-17
Abstract
No abstract record available.
Inventors
- 👤 Christopher L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:17
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/905; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/25; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/31504; Y10T428/31551; Y10T428/31598
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2900278A
Cited
US2926390A
Cited
US2895603A
Cited
US2920983A
Cited
US3004921A
Cited
US3057750A
Cited
US3024209A
Cited
US3094433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |