US3530627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trench header duct system
Assignee: General Electric Co
•
Filing: 1968-07-10
•
Granted: 1970-09-29
•
Expires: 1988-07-10
Abstract
No abstract record available.
Inventors
- 👤 Eugene H Carter
- 👤 Albert C Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:16
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/28; H02G3/283; H02G3/02; H02G3/06; H02G3/0608
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA771877A
Cited
GB424842A
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US2849942A
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US3023032A
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US3074208A
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US3061663A
Cited
GB901279A
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US3196764A
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US3204378A
Cited
US3435568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |