US3203997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted polyphenyl ethers
Assignee: Shell USA Inc
•
Filing: 1957-12-09
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Granted: 1965-08-31
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Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Mahoney
- 👤 Karl J Sax
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:34
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2227/00; C10M2227/04; C10N; C10N2030/00; C10N2030/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
1 words
BIS(P-(O-PHENYL-P-TERT-BUTYLPHENOXY)PHENYL)ETHER.
Claim 2
Dependent Claim
1 words
BIS(P-(O-PHENYL-P-TERT-BUTYLPHENOXY)PHENYL)ETHER.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |