US2549987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray diffraction method
Assignee: Philips Laboratories Inc
•
Filing: 1948-03-27
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Granted: 1951-04-24
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Expires: 1968-03-27
Abstract
No abstract record available.
Inventors
- 👤 Parrish William
- 👤 Edward A Hamacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:33
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G01; G01N; G01N23/00; G01N23/20; G01N23/201; G01N23/207; H; H01; H01J; H01J47/00; H01J47/08; H01J5/00; H01J5/02; H01J5/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1164987A
Cited
US1589833A
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DE670322C
Cited
US2011540A
Cited
US2331586A
Cited
US2386785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |