US3452116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant polyglycidyl ethers of tetrakis(dihalohydroxyphenyl)ethane and propane
Assignee: Shell USA Inc
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Filing: 1966-05-25
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Granted: 1969-06-24
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Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 Carl G Schwarzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:19
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3218; C08G59/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3016362A
Cited
US3218370A
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US3058946A
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US3218369A
Cited
US3280216A
Cited
US3268619A
Cited
US3271350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |