US2771297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1955-07-07
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Granted: 1956-11-20
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Expires: 1975-07-07
Abstract
No abstract record available.
Inventors
- 👤 Nipken Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:18
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/208; Y; Y10; Y10T; Y10T279/00; Y10T279/14; Y10T279/17; Y10T279/17411; Y10T279/17529; Y10T279/17538; Y10T279/17957; Y10T279/34; Y10T279/3481; Y10T279/3487; Y10T82/00; Y10T82/25; Y10T82/2572; Y10T82/2574; Y10T82/2579
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |