US2909915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor tap for electric header duct system
Assignee: HK Porter Co Inc
•
Filing: 1958-04-15
•
Granted: 1959-10-27
•
Expires: 1978-04-15
Abstract
No abstract record available.
Inventors
- 👤 Frank J Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:49
CPC Classifications
E; E04; E04F; E04F19/00; E04F19/08; H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/18; H02G3/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2575685A
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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) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |