US2917052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
File drawers
Assignee: Individual
•
Filing: 1956-06-01
•
Granted: 1959-12-15
•
Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Cornelius H Van Donk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:08
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)
US799689A
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US1013234A
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US1738419A
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US1899530A
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US1975806A
Cited
US1983576A
Cited
US2115389A
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US2232531A
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US2229881A
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US2236807A
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US2689573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |