US2970200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact pileup
Assignee: Watchfire Signs LLC
•
Filing: 1957-05-06
•
Granted: 1961-01-31
•
Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Wendell R Walker
- 👤 Edward J Schulenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:47
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/56; H01H50/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1121897A
Cited
US1185371A
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US1969488A
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US2279811A
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US2598519A
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US2755356A
Cited
FR1053607A
Cited
US2742538A
Cited
US2807690A
Cited
GB770030A
Cited
GB771912A
Cited
US2741682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |