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US2993252A
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Assignee: Individual
•
Filing: 1958-12-29
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Granted: 1961-07-25
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Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Held Leendert De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:06
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/24; A44B19/26; Y; Y10; Y10T; Y10T24/00; Y10T24/25; Y10T24/2518; Y10T24/2527; Y10T24/2539; Y10T24/2543; Y10T24/2561; Y10T24/2566; Y10T24/257; Y10T24/2571; Y10T24/2577
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR956320A
Cited
US1746565A
Cited
US2339350A
Cited
US2554929A
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CH264283A
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US2736940A
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US2907087A
Cited
US2888727A
Cited
US2867878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |