Patent US3500229A successfully refreshed from Google Patents.
US3500229A
Expired / Lapsed
US
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Multimode transistor multivibrator
Assignee: Unisys Corp
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Filing: 1967-11-22
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Granted: 1970-03-10
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Expires: 1987-11-22
Abstract
No abstract record available.
Inventors
- 👤 Douglas E Haggan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:17
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2757286A
Cited
US2888579A
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US2838675A
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US2888580A
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US2900502A
Cited
US3008088A
Cited
US3331032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |