US2915415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leucauramine derivate of benzoyl leuco methylene blue and transfer sheet coated therewith
Assignee: Caribonum Ltd
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Filing: 1958-06-05
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Granted: 1959-12-01
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Expires: 1978-06-05
Abstract
No abstract record available.
Inventors
- 👤 Francis Frederick George
- 👤 Neale David John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:21
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; C; C09; C09B; C09B11/00; C09B11/02; Y; Y10; Y10S; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
12 words
A TRANSFER SHEET MATERIAL, WHICH CARRIES A COLOURLESS COATING WHICH INCLUDES 10-(4-N-LEUCAURAMINE-BENZOYL)3,7-BIS-(DIMETHYL-AMINO)-PHENOTHIAZINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |