US3045680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke filtering device
Assignee: Individual
•
Filing: 1958-09-30
•
Granted: 1962-07-24
•
Expires: 1978-09-30
Abstract
No abstract record available.
Inventors
- 👤 Millard F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:41
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US492676A
Cited
CH30877A
Cited
US1778482A
Cited
US1809529A
Cited
CH189399A
Cited
US2314147A
Cited
DE878015C
Cited
GB740329A
Cited
US2902998A
Cited
US2958328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |