US2721669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1950-04-21
•
Granted: 1955-10-25
•
Expires: 1970-04-21
Abstract
No abstract record available.
Inventors
- 👤 Clifford D Keely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/04; B65B51/06; B31; B31B; B31B50/00; B31B50/60; B31B50/72; B31B50/726; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1343; Y10T83/00; Y10T83/444; Y10T83/4458; Y10T83/446; Y10T83/4587; Y10T83/4592; Y10T83/869; Y10T83/8798; Y10T83/8804
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US641027A
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US1150784A
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US1435979A
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US1464544A
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US2223767A
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US2540694A
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US2513647A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |