US2648993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1951-02-19
•
Granted: 1953-08-18
•
Expires: 1971-02-19
Abstract
No abstract record available.
Inventors
- 👤 Wilfred H Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:19
CPC Classifications
B; B60; B60T; B60T7/00; B60T7/02; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20207; Y10T74/20256; Y10T74/20268
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1873458A
Cited
US1870525A
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US2180430A
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US2200625A
Cited
US2197671A
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US2207954A
Cited
US2494547A
Cited
US2511165A
Cited
US2563339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |