US3384515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing improved cast iron articles
Assignee: Motors Liquidation Co
•
Filing: 1965-06-21
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Granted: 1968-05-21
•
Expires: 1985-06-21
Abstract
No abstract record available.
Inventors
- 👤 Allen D Ackerman
- 👤 Roy R Albertzart
- 👤 Arthur P Siewert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:51
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/04; C21; C21D; C21D5/00; C22C33/00; C22C33/08; C22C37/06; C22C37/08; C22C37/10; F; F01; F01L; F01L2301/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2530545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |