US3431573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized-water-operated cleaning apparatus
Assignee: RICHARD L FRANDSEN
•
Filing: 1966-06-27
•
Granted: 1969-03-11
•
Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 Richard L Frandsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:35
CPC Classifications
A; A47; A47L; A47L17/00; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US847060A
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GB191505951A
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US1617838A
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US1696835A
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US2019705A
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US2285865A
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US2471623A
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US2599911A
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AT192081B
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US2841170A
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US3136336A
Cited
US3121897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |