US3489312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug for oil pan openings and the like
Assignee: Hunckler Products Inc
•
Filing: 1968-05-03
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Granted: 1970-01-13
•
Expires: 1988-05-03
Abstract
No abstract record available.
Inventors
- 👤 Paul J Hunckler
- 👤 George M Keefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
F; F16; F16B; F16B29/00; B; B65; B65D; B65D39/00; B65D39/12; F01; F01M; F01M11/00; F01M11/04; F01M11/0408; F16B5/00; F16B5/02; F16B5/0258; F16N; F16N21/00; F16N21/06; F01M2011/0416
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2072426A
Cited
US2439628A
Cited
US2533715A
Cited
US2566816A
Cited
US2923323A
Cited
US3307731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |