Patent US2899068A successfully refreshed from Google Patents.
US2899068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
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Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:39
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/70; B01D33/76; B01D33/06; B01D33/073; B01D33/15; B01D33/44; B01D33/46; B01D33/466; B01D33/72
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US337037A
Cited
US1726483A
Cited
US1607362A
Cited
US1871627A
Cited
US1945776A
Cited
GB493794A
Cited
US2337038A
Cited
US2489681A
Cited
US2655265A
Cited
US2698013A
Cited
US2678133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |