Patent US4325218A successfully refreshed from Google Patents.
Patent US2899459A successfully refreshed from Google Patents.
US2899459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salts of z
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:33
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2406; C10L1/2418; C07; C07C; C07C323/00; C07C323/50; C07C323/51; C07C323/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A SALT OF A 2,4-DINAPHTHENYL-3-THIAGLUTARIC ACID AND A 1,3-DIAMINOPROPANE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
13 words
A SALT OF A 2,4-DINAPHTHENYL-3-THIAGLUTARIC ACID AND A 1,3-DIAMINOPROPANE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
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US2317666A
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |