US2477246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine signaling device
Assignee: AT&T Inc
•
Filing: 1945-05-16
•
Granted: 1949-07-26
•
Expires: 1965-05-16
Abstract
No abstract record available.
Inventors
- 👤 Rollin W Gillespie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:31
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1594069A
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US2248870A
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US1729161A
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US2374637A
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US2063950A
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US2424030A
Cited
US2283285A
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US2430013A
Cited
US2413462A
Cited
US2405604A
Cited
US2405605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |