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US2731017A
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Assignee: Zephyr American Corp
•
Filing: 1951-03-30
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Granted: 1956-01-17
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Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 Hildaur L Neilsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:23
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/28; Y; Y10; Y10S; Y10S402/00; Y10S402/501
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1027523A
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US2168323A
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US2231029A
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US2441717A
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US2486820A
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US2510924A
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US2479167A
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US2651305A
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US2703744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |