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Patent US3033637A successfully refreshed from Google Patents.
US3033637A
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Assignee: DONK VAN
•
Filing: 1959-10-19
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Granted: 1962-05-08
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Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 Cornelius H Van Donk
- 👤 Oran R Cleereman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:51
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/02; B42F17/08; B42F17/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US757194A
Cited
US821576A
Cited
US1706085A
Cited
US1899530A
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US1892020A
Cited
US2676866A
Cited
US2917052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |