Patent US3429148A successfully refreshed from Google Patents.
US3429148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage filter system for dry cleaning
Assignee: GEORGE M WORTHINGTON
•
Filing: 1966-01-03
•
Granted: 1969-02-25
•
Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 George M Worthington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:41
CPC Classifications
D; D06; D06F; D06F43/00; D06F43/08; D06F43/081; D06F43/085
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |