US2543006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke agent
Assignee: Individual
•
Filing: 1943-11-08
•
Granted: 1951-02-27
•
Expires: 1963-11-08
Abstract
No abstract record available.
Inventors
- 👤 Finkelstein Leo
- 👤 Sidney J Magram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:39
CPC Classifications
C; C06; C06B; C06B29/00; C06B29/02; C06B29/08; C06B29/10; C06D; C06D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A COLORED SMOKE FORMING COMPOSITION COMPRISING A DRY FUEL MIXTURE OF SULFUR AND POTASSIUM CHLORATE, A COMBUSTION CONTROLLING AGENT IN A PROPORTION OF FROM ABOUT 8% TO 28.5% NAHCO3 AND A DYESTUFF CONSISTING BY WEIGHT OF FROM NOT LESS THAN 35% NOR MORE THAN 45% OF SAID COMPOSITION SELECTED FROM A GROUP CONSISTING OF 1 METHYLAMINOANTHRAQUINONE, 1,4-DIAMINO-2,3-DIHYDRO ANTHRAQUINONE AND A MIXTURE OF EACH OF SAID QUINONES.
Claim 2
Dependent Claim
66 words
A COLORED SMOKE FORMING COMPOSITION COMPRISING A DRY FUEL MIXTURE OF SULFUR AND POTASSIUM CHLORATE, A COMBUSTION CONTROLLING AGENT IN A PROPORTION OF FROM ABOUT 8% TO 28.5% NAHCO3 AND A DYESTUFF CONSISTING BY WEIGHT OF FROM NOT LESS THAN 35% NOR MORE THAN 45% OF SAID COMPOSITION SELECTED FROM A GROUP CONSISTING OF 1 METHYLAMINOANTHRAQUINONE, 1,4-DIAMINO-2,3-DIHYDRO ANTHRAQUINONE AND A MIXTURE OF EACH OF SAID QUINONES.
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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |