US3433403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan inlet shroud
Assignee: Lau Blower Co
•
Filing: 1966-12-16
•
Granted: 1969-03-18
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Expires: 1986-12-16
Abstract
No abstract record available.
Inventors
- 👤 Reuben A Gerlitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:08
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04D29/545; F04D29/547; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE1065560B
Cited
US2123657A
Cited
GB511928A
Cited
US2536130A
Cited
US2609053A
Cited
US2620230A
Cited
FR1178215A
Cited
GB816536A
Cited
US3145978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |