Patent US2031667A successfully refreshed from Google Patents.
US2031667A
Expired / Lapsed
US
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Audible signal device
Assignee: PIPKIN
•
Filing: 1928-01-28
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Granted: 1936-02-25
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Expires: 1948-01-28
Abstract
No abstract record available.
Inventors
- 👤 Maurice E Pipkin
- 👤 Blake Eli Judson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:33
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0269; G; G10; G10K; G10K9/00; G10K9/12; G10K9/13; B06B2201/00; B06B2201/50; B06B2201/52; B06B2201/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1939-02-24 | 1939-08-26 | 1940-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-02-24 | 1943-08-26 | 1944-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-02-24 | 1947-08-26 | 1948-02-25 | $7700.00 | Window Closed / Lapsed |