US3469135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone signal generator
Assignee: Marmon Co
•
Filing: 1967-03-24
•
Granted: 1969-09-23
•
Expires: 1987-03-24
Abstract
No abstract record available.
Inventors
- 👤 Lyman J Haviland
- 👤 Herbert E Meinema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:49
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/03; G10H3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1160087A
Cited
US1295691A
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US2012207A
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GB384681A
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GB385926A
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US1956350A
Cited
US2130251A
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US2159505A
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US2314496A
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US2417868A
Cited
US2415022A
Cited
US3087080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |