US3474085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali and alkaline earth metallic salts of azoformic acids
Assignee: Pennwalt Corp
•
Filing: 1968-08-21
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Granted: 1969-10-21
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Expires: 1988-08-21
Abstract
No abstract record available.
Inventors
- 👤 Ronald Edward Macleay
- 👤 Chester Stephen Sheppard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:40
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/63; C07C255/65; C07C281/00; C07C281/20; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2889245A
Cited
US2903361A
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US2910463A
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US3141002A
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US3140310A
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US3346554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |