Patent US2928841A successfully refreshed from Google Patents.
US2928841A
Expired / Lapsed
US
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Phosphorothiolothionate derivatives of hydantoins
Assignee: Eastman Kodak Co
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Filing: 1957-09-06
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Granted: 1960-03-15
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Expires: 1977-09-06
Abstract
No abstract record available.
Inventors
- 👤 Richard L Mcconnell
- 👤 Jr Harry W Coover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:51
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6503; C07F9/6506
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
AS A COMPOSITION OF MATTER, THE ORGANOPHOSPROUS COMPOUNDS HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
12 words
AS A COMPOSITION OF MATTER, THE ORGANOPHOSPROUS COMPOUNDS HAVING THE STRUCTURAL 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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |