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US2617428A
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Assignee: PRODUCT DEV ENGINEERING RES AN
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Filing: 1950-07-03
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Granted: 1952-11-11
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Expires: 1970-07-03
Abstract
No abstract record available.
Inventors
- 👤 Smereck Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:58
CPC Classifications
B; B60; B60N; B60N3/00; B60N3/08; B60N3/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB268990A
Cited
US1727515A
Cited
US1671813A
Cited
US1932625A
Cited
US2000920A
Cited
GB470321A
Cited
US2315608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |