Patent US3409591A successfully refreshed from Google Patents.
US3409591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy-containing condensates, their preparation and use
Assignee: Shell USA Inc
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Filing: 1966-12-27
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Granted: 1968-11-05
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Expires: 1986-12-27
Abstract
No abstract record available.
Inventors
- 👤 Alton J Landua
- 👤 James R Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:52
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/10; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/623
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
ACETONE-SOLUBLE HIGHLY REACTIVE EPOXY-CONTAINING CONDENSATES OF (1) POLYEPOXIDE POSSESSING MORE THAN 1 VIC-EPOXY GROUP, AND (2) A POLYFUNCTIONAL AROMATIC AMINE POSSESSING MORE THAN TWO ACTIVE HYDROGEN ATTACHED TO AMINO NITROGEN SAID CONDENSATES HAVING A WEIGHT PER EPOXIDE OF FROM AT LEAST ABOUT 300 TO ABOUT 3,000.
Claim 2
Dependent Claim
46 words
ACETONE-SOLUBLE HIGHLY REACTIVE EPOXY-CONTAINING CONDENSATES OF (1) POLYEPOXIDE POSSESSING MORE THAN 1 VIC-EPOXY GROUP, AND (2) A POLYFUNCTIONAL AROMATIC AMINE POSSESSING MORE THAN TWO ACTIVE HYDROGEN ATTACHED TO AMINO NITROGEN SAID CONDENSATES HAVING A WEIGHT PER EPOXIDE OF FROM AT LEAST ABOUT 300 TO ABOUT 3,000.
References Cited (Backward Citations)
US2773048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |