US2723364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug
Assignee: Individual
•
Filing: 1951-01-26
•
Granted: 1955-11-08
•
Expires: 1971-01-26
Abstract
No abstract record available.
Inventors
- 👤 Cipriani Chester
- 👤 Walter R Manthey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:48
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/40; H01T13/41
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1960317A
Cited
US2071571A
Cited
US1276396A
Cited
US1352089A
Cited
US1401585A
Cited
US1960316A
Cited
US1960309A
Cited
US2029570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |