US2513441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording head carriage guiding means
Assignee: Celanese Corp
•
Filing: 1945-09-15
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Granted: 1950-07-04
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Expires: 1965-09-15
Abstract
No abstract record available.
Inventors
- 👤 Allen Henry Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:13
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/10; G11B3/34; G11B3/36; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18648
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR13255E
Cited
US430759A
Cited
US458916A
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US1947290A
Cited
US2293217A
Cited
US2239359A
Cited
US2350490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-03 | 1954-01-02 | 1954-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-03 | 1958-01-02 | 1958-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-03 | 1962-01-02 | 1962-07-04 | $7700.00 | Window Closed / Lapsed |