US2938593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination sound-deadening and gas-purifying apparatus
Assignee: Individual
•
Filing: 1957-10-14
•
Granted: 1960-05-31
•
Expires: 1977-10-14
Abstract
No abstract record available.
Inventors
- 👤 Meral O Miller
- 👤 James L Matheny
- 👤 Raymond L Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:08
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; F; F01; F01N; F01N1/00; F01N1/08; F01N1/089; F01N3/00; F01N3/08; F01N3/0892; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/2839; F01N3/2882; F01N3/2885; F01N2230/00; F01N2230/04; F01N2240/00; F01N2240/04; F01N2310/00; F01N2310/02; F01N2490/00; F01N2490/02; F01N2490/04; F01N2510/00; F01N2510/06; Y; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1698842A
Cited
GB411807A
Cited
FR822317A
Cited
US2166670A
Cited
US2124933A
Cited
US2395005A
Cited
US2511597A
Cited
US2701621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |