US2639458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1950-01-25
•
Granted: 1953-05-26
•
Expires: 1970-01-25
Abstract
No abstract record available.
Inventors
- 👤 Paul H Travis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:43
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/12; E05C17/20; E05C17/203; Y; Y10; Y10S; Y10S16/00; Y10S16/07; Y10T; Y10T292/00; Y10T292/28; Y10T292/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1357655A
Cited
GB415228A
Cited
US2032600A
Cited
US2125010A
Cited
US2200567A
Cited
US2219822A
Cited
US2219800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |