Patent US3446537A successfully refreshed from Google Patents.
US3446537A
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Assignee: WALTER S SUTOWSKI
•
Filing: 1968-02-14
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Granted: 1969-05-27
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Expires: 1988-02-14
Abstract
No abstract record available.
Inventors
- 👤 Walter S Sutowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:49
CPC Classifications
B; B60; B60B; B60B37/00; B60B37/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2427430A
Cited
US2692801A
Cited
US2955884A
Cited
US2935357A
Cited
US2866672A
Cited
US3290101A
Cited
US3400990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |