Patent US3460321A successfully refreshed from Google Patents.
US3460321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an air filter
Assignee: Individual
•
Filing: 1967-09-27
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Granted: 1969-08-12
•
Expires: 1987-09-27
Abstract
No abstract record available.
Inventors
- 👤 Nicholas Canzoneri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:10
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; B01D39/10; B01D39/12; B01D39/14; B01D39/16; B01D39/1669; B01D39/18; B01D2239/00; B01D2239/06; B01D2239/065; B01D2239/0654
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |