US2648828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphone
Assignee: Texaco Development Corp
•
Filing: 1949-04-13
•
Granted: 1953-08-11
•
Expires: 1969-04-13
Abstract
No abstract record available.
Inventors
- 👤 Charles F Teichmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
G; G01; G01H; G01H11/00; G01H11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1809713A
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US1836109A
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US2171793A
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US2321322A
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US2232476A
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US2380514A
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US2359245A
Cited
US2400467A
Cited
US2403535A
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US2477507A
Cited
US2435254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |