US2978064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas purifier
Assignee: DO MORE PRODUCTS CORP
•
Filing: 1959-02-19
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Granted: 1961-04-04
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Expires: 1979-02-19
Abstract
No abstract record available.
Inventors
- 👤 Danny B Deaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:17
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/10; F24F8/108; B; B01; B01D; B01D39/00; B01D39/02; B01D39/06; B01D39/14; B01D39/20; B01D39/2068; B01D39/2072; B01D46/00; B01D46/30; B01D46/32; F24C; F24C15/00; F24C15/20; F24C15/2035; B01D2239/00; B01D2239/04; B01D2239/0457
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1743675A
Cited
US1783194A
Cited
US2621755A
Cited
US2633929A
Cited
US2641331A
Cited
US2786471A
Cited
US2886124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |