US2449902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration
Assignee: Texaco Inc
•
Filing: 1945-05-22
•
Granted: 1948-09-21
•
Expires: 1965-05-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Wynkoop Kiersted
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:36
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/09; B01D33/44; B01D33/46; B01D33/466; B01D33/58; B01D33/60; B01D33/80; B01D33/82; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22646E
Cited
US1593051A
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US2186289A
Cited
US2352303A
Cited
US2352304A
Cited
US2362300A
Cited
US2348822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |