US3002352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flameholder construction
Assignee: RTX Corp
•
Filing: 1957-11-12
•
Granted: 1961-10-03
•
Expires: 1977-11-12
Abstract
No abstract record available.
Inventors
- 👤 William E Helfrich
- 👤 Chamberlain John
- 👤 Edmund D Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:05
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/16; F23R3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2482505A
Cited
GB685944A
Cited
US2672726A
Cited
US2798360A
Cited
US2872785A
Cited
US2835109A
Cited
US2775867A
Cited
US2780916A
Cited
US2929203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |