US2633992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sparger
Assignee: Individual
•
Filing: 1947-04-28
•
Granted: 1953-04-07
•
Expires: 1967-04-28
Abstract
No abstract record available.
Inventors
- 👤 Hock Alvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:39
CPC Classifications
C; C12; C12C; C12C7/00; C12C7/14; C12C7/16; C12C7/163; C12C7/24; C12C2200/00; C12C2200/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US703846A
Cited
US957981A
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US1555849A
Cited
US1793449A
Cited
US1932827A
Cited
US2034784A
Cited
US2149748A
Cited
US2217751A
Cited
US2368662A
Cited
US2412400A
Cited
US2529882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |