US3434280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust chamber
Assignee: JOE H BURKHART
•
Filing: 1967-11-20
•
Granted: 1969-03-25
•
Expires: 1987-11-20
Abstract
No abstract record available.
Inventors
- 👤 Joe H Burkhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:34
CPC Classifications
F; F02; F02B; F02B27/00; F02B27/04; F02B27/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1229471A
Cited
US1834473A
Cited
US1804321A
Cited
US1860569A
Cited
US2102559A
Cited
US3254484A
Cited
US3367311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |