US3464398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soundproofed internal combustion engine
Assignee: Individual
•
Filing: 1968-05-03
•
Granted: 1969-09-02
•
Expires: 1988-05-03
Abstract
No abstract record available.
Inventors
- 👤 Andreas Scheiterlein
- 👤 Gerhard Thien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:08
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/11; F02B77/13
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1602089A
Cited
US1759147A
Cited
US2340885A
Cited
US3046954A
Cited
US3195530A
Cited
US3412724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |