US3470689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas burner and muffler
Assignee: FRANK K GURR
•
Filing: 1967-08-29
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Granted: 1969-10-07
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Expires: 1987-08-29
Abstract
No abstract record available.
Inventors
- 👤 Frank K Gurr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N13/00; F01N13/009; F01N13/0097; F01N3/26; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/10; Y10S55/19; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US756203A
Cited
GB312200A
Cited
US2077563A
Cited
US3091078A
Cited
US3233699A
Cited
US3209532A
Cited
US3276202A
Cited
US3350878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |