US3509508A
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Assignee: E G AND G Inc
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Filing: 1968-10-08
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Granted: 1970-04-28
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Expires: 1988-10-08
Abstract
No abstract record available.
Inventors
- 👤 John H Kraemer
- 👤 James A Rome
- 👤 Walter F J Crewson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:49
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K17/00; H03K17/51; H03K17/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |