US2886794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphone
Assignee: Individual
•
Filing: 1943-09-11
•
Granted: 1959-05-12
•
Expires: 1963-09-11
Abstract
No abstract record available.
Inventors
- 👤 Cecil K Stedman
- 👤 Frederick H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:27
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1450287A
Cited
US942897A
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US1002903A
Cited
US1426757A
Cited
CH101140A
Cited
US1445508A
Cited
US2063950A
Cited
GB405613A
Cited
US2153571A
Cited
US2170206A
Cited
US2415407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |