Patent US3023032A successfully refreshed from Google Patents.
US3023032A
Expired / Lapsed
US
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Couplings for sheet wireway ducts
Assignee: General Electric Co
•
Filing: 1956-11-09
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Granted: 1962-02-27
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Expires: 1976-11-09
Abstract
No abstract record available.
Inventors
- 👤 Frank C Johnston
- 👤 Krauss Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:45
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/58; E04B1/5825; E04B1/5831; H; H02; H02G; H02G3/00; H02G3/02; H02G3/06; H02G3/0608; E04B2001/5856
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |