US3448756A
Expired / Lapsed
US
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Automatic pulsator
Assignee: Alfa Laval AB
•
Filing: 1967-08-22
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Granted: 1969-06-10
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Expires: 1987-08-22
Abstract
No abstract record available.
Inventors
- 👤 Sven-Ake Nordegren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:29
CPC Classifications
F; F03; F03C; F03C7/00; A; A01; A01J; A01J5/00; A01J5/04; A01J5/10; A01J5/12; F01; F01L; F01L33/00; F01L33/04; F01L3/00; F01L2003/25; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2546; Y10T137/2549; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL71250C
Cited
US1538733A
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US2051371A
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US2251241A
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US2501294A
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US2625948A
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US2965351A
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US3064628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |