US2503472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrophoric ignition
Assignee: —
•
Filing: —
•
Granted: 1950-04-11
•
Expires: 1967-04-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:00
CPC Classifications
F; F02; F02B; F02B1/00; C; C06; C06C; C06C9/00; C10; C10L; C10L1/00; C10L1/10; C10L1/12; C10L1/1208; C10L1/1233; C10L1/1266; C10L1/1291; C10L1/32; C10L1/328; C10L10/00; C10L10/02; F02B1/02; F02B1/04; F02B1/06; F23; F23J; F23J7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190322531A
Cited
US1274941A
Cited
US1506323A
Cited
US1506322A
Cited
US1532930A
Cited
GB559348A
Cited
US2394608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |