Patent US5553284A successfully refreshed from Google Patents.
US3299101A
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Substituted pyromellitic dianhydrides
Assignee: EIDP Inc
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Filing: 1965-05-04
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Granted: 1967-01-17
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Expires: 1985-05-04
Abstract
No abstract record available.
Inventors
- 👤 Tocker Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:18
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1075; C08G73/1082; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/782; C07C49/784; C07C49/788; C07C51/00; C07C51/16; C07C51/27; C07C51/275; C07C65/00; C07C65/32; C07C65/34; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081; C07F7/0812; C07F7/0814; C08G73/1046; C08G73/105; C08G73/1057; C08G73/1067; C08G73/1071
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
2 words
BENZOYLPYROMELLITIC DIANHYDRIDE.
Claim 2
Dependent Claim
2 words
BENZOYLPYROMELLITIC DIANHYDRIDE.
Claim 3
Dependent Claim
3 words
ALPHA-NAPHTHOYL PYROMELLITIC DIANHYDRIDE.
Claim 4
Dependent Claim
3 words
ALPHA-NAPHTHOYL PYROMELLITIC DIANHYDRIDE.
Claim 5
Dependent Claim
3 words
TRIMETHYLSILICYL PYROMELLITIC DIANHYDRIDE.
Claim 6
Dependent Claim
3 words
TRIMETHYLSILICYL PYROMELLITIC DIANHYDRIDE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |