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US3471554A
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US
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Derivatives of bisphenolic substituted carboxylic acids
Assignee: 3M Co
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Filing: 1967-09-08
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Granted: 1969-10-07
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Expires: 1987-09-08
Abstract
No abstract record available.
Inventors
- 👤 Reynold E Holmen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:31
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/42; C07C59/52; C07C59/58; C07C59/64; C08; C08G; C08G59/00; C08G59/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2933520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |