US2589519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent agents
Assignee: GAF Chemicals Corp
•
Filing: 1951-01-15
•
Granted: 1952-03-18
•
Expires: 1971-01-15
Abstract
No abstract record available.
Inventors
- 👤 Paul E Hoch
- 👤 William H Libby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:50
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/205; C07C39/21; C07C39/215; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
FLUORESCENT AGENTS OF THE FORMULA
Claim 2
Dependent Claim
5 words
FLUORESCENT AGENTS OF THE FORMULA
References Cited (Backward Citations)
US2468431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |