US2749998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silencer for gaseous streams
Assignee: Air Maze Corp
•
Filing: 1953-01-28
•
Granted: 1956-06-12
•
Expires: 1973-01-28
Abstract
No abstract record available.
Inventors
- 👤 George M Walton
- 👤 Richard E Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:22
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/66; F04D29/661; F04D29/663; F04D29/664; F16; F16L; F16L55/00; F16L55/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1115873A
Cited
US2050581A
Cited
US2164365A
Cited
US2064207A
Cited
GB493538A
Cited
US2661072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |