Patent US3421293A successfully refreshed from Google Patents.
US3421293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paint spray booths
Assignee: Schweitzer Equipment Co
•
Filing: 1967-04-19
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Granted: 1969-01-14
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Expires: 1987-04-19
Abstract
No abstract record available.
Inventors
- 👤 James Henry Collins Halls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:15
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B05; B05B; B05B14/00; B05B14/40; B05B14/46; B05B14/468; Y; Y10; Y10S; Y10S55/00; Y10S55/46
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |