US3500841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid recovery system and method
Assignee: Individual
•
Filing: 1968-08-01
•
Granted: 1970-03-17
•
Expires: 1988-08-01
Abstract
No abstract record available.
Inventors
- 👤 Campbell F Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:27
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/06; E21; E21B; E21B43/00; E21B43/01; E21B43/0122; F; F16; F16L; F16L1/00; F16L1/26; F16L2101/00; F16L2101/30; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/923; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/0402; Y10T137/0441; Y10T137/048; Y10T137/5762
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) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |