Patent US2778563A successfully refreshed from Google Patents.
US2778563A
Expired / Lapsed
US
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Vacuum and blower producer
Assignee: Doyle Vacuum Cleaner Co
•
Filing: 1953-03-16
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Granted: 1957-01-22
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Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Dewey I Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:51
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462; F04D29/464
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) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |