US2688779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1951-03-28
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Granted: 1954-09-14
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Expires: 1971-03-28
Abstract
No abstract record available.
Inventors
- 👤 Elmer A Westman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:28
CPC Classifications
E; E05; E05F; E05F17/00; E05Y; E05Y2800/00; E05Y2800/26; E05Y2800/31; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/148; Y; Y10; Y10S; Y10S16/00; Y10S16/39; Y10T; Y10T292/00; Y10T292/28; Y10T292/65; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32057
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) | 1957-09-13 | 1958-03-15 | 1958-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-13 | 1962-03-15 | 1962-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-13 | 1966-03-15 | 1966-09-14 | $7700.00 | Window Closed / Lapsed |