US3441223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Parker Hannifin Corp
•
Filing: 1967-03-08
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Granted: 1969-04-29
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Expires: 1987-03-08
Abstract
No abstract record available.
Inventors
- 👤 Dominic J Lapera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/38; B; B05; B05B; B05B1/00; B05B1/30; B05B1/3006; B05B1/34; B05B1/3405; B05B1/341; B05B1/3421; B05B1/3431; B05B1/3436; B05B1/3468; B05B1/3473; B05B1/3478; F23D11/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |