US3149409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an engine piston with a heat insulating layer
Assignee: Daimler Benz AG
•
Filing: 1960-11-28
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Granted: 1964-09-22
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Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert F W Maruhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:50
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/10; F02F3/12; F02F3/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T29/49258; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12486
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |