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Patent US3470529A successfully refreshed from Google Patents.
US3470529A
Expired / Lapsed
US
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Tubular blade for electrical plug caps
Assignee: HEYMAN Mfg CO Inc
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Filing: 1967-05-22
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Granted: 1969-09-30
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Expires: 1987-05-22
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand Klumpp Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:02
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/04
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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |