US3471265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic muffler device
Assignee: WR Grace and Co
•
Filing: 1965-01-27
•
Granted: 1969-10-07
•
Expires: 1985-01-27
Abstract
No abstract record available.
Inventors
- 👤 Frank G Ciapetta
- 👤 Donald S Henderson
- 👤 George A Baust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:10
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/10; F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2846; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F25/3124; B01F25/31242; F01N3/30; F01N3/34; F01N2330/00; F01N2330/08; F01N2450/00; F01N2450/04; F01N2510/00; F01N2510/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2886121A
Cited
US2947600A
Cited
US2995199A
Cited
US3252767A
Cited
US3176461A
Cited
US3338682A
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 |