US2918693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction cleaning apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1957-10-30
•
Granted: 1959-12-29
•
Expires: 1977-10-30
Abstract
No abstract record available.
Inventors
- 👤 Francis A Gasparini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:22
CPC Classifications
A; A47; A47L; A47L5/00; A47L5/12; A47L5/22; A47L5/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB337319A
Cited
US2248585A
Cited
US2232548A
Cited
US2621756A
Cited
US2747214A
Cited
US2779047A
Cited
US2719600A
Cited
US2825087A
Cited
FR1108917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |