US3538535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window cleaning apparatus
Assignee: Standard Oil Co
•
Filing: 1967-06-15
•
Granted: 1970-11-10
•
Expires: 1987-06-15
Abstract
No abstract record available.
Inventors
- 👤 Irwin Ginsburgh
- 👤 Lawrence T Wright
- 👤 Benjamin D Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:40
CPC Classifications
A; A47; A47L; A47L1/00; A47L1/06; A47L1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA584806A
Cited
US1114592A
Cited
US1759920A
Cited
US2292435A
Cited
US2251264A
Cited
US3195167A
Cited
US3345672A
Cited
US3431582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |