US3470680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter
Assignee: Bahnson Co
•
Filing: 1966-06-10
•
Granted: 1969-10-07
•
Expires: 1986-06-10
Abstract
No abstract record available.
Inventors
- 👤 William W Avera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:30
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; B01D46/12; B01D46/121; Y; Y10; Y10T; Y10T24/00; Y10T24/10; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T29/49616; Y10T29/4962
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2016033A
Cited
US2209741A
Cited
US2347120A
Cited
US2886481A
Cited
US2857017A
Cited
US3001246A
Cited
US3076303A
Cited
US3056361A
Cited
GB998146A
Cited
GB975974A
Cited
US3218784A
Cited
US3274759A
Cited
US3406503A
Cited
US3373546A
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 |