Patent US2710341A successfully refreshed from Google Patents.
US2710341A
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US
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Approach warning system
Assignee: Motorola Solutions Inc
•
Filing: 1949-09-06
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Granted: 1955-06-07
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Expires: 1969-09-06
Abstract
No abstract record available.
Inventors
- 👤 Marion R Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:10
CPC Classifications
B; B61; B61L; B61L1/00; B61L1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1971482A
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US1550538A
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US1583110A
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US2000166A
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US1985911A
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US2590483A
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US2611075A
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US2487102A
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US2547027A
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US2587164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |