US2956898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certification of correction
Assignee: —
•
Filing: —
•
Granted: 1960-10-18
•
Expires: 1977-10-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:26
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/08; C07D311/16; C11; C11D; C11D3/00; C11D3/40; C11D3/42; D; D06; D06L; D06L4/00; D06L4/60; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A METHOD OF ENHANCING THE WHITE CONTENT OF ORGANIC MATERIAL, WHICH COMPRISES TREATING THE SAID MATERIAL WITH A DILUTE AQUEOUS SOLUTION OF A BLUE-FLUORESCING COMPOUND OF THE FORMULA
Claim 2
Independent Claim
28 words
A METHOD OF ENHANCING THE WHITE CONTENT OF ORGANIC MATERIAL, WHICH COMPRISES TREATING THE SAID MATERIAL WITH A DILUTE AQUEOUS SOLUTION OF A BLUE-FLUORESCING COMPOUND OF THE FORMULA
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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |