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Patent US2840548A successfully refreshed from Google Patents.
US2840548A
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US
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Polymeric reaction products of unsaturated dilactones and complementary polyfunctional reactants
Assignee: EIDP Inc
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Filing: 1955-11-25
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Granted: 1958-06-24
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Expires: 1975-11-25
Abstract
No abstract record available.
Inventors
- 👤 Benjamin W Howk
- 👤 John C Sauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:11
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08G73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A POLYMERIC REACTION PRODUCT OF AN UNSATURATED DILACTONE AND AN ORGANIC COMPLEMENTARY POLYFUNCTIONAL REACTANT CONTAINING AT LEAST TWO GROUPS SELECTED FROM THE CLASS CONSISTING OF HYDROXYL AND PRIMARY AND SECONDARY AMINO GROUPS, SAID UNSATURATED DILACTONE HAVING ONE OF THE FORMULAS
Claim 2
Dependent Claim
40 words
A POLYMERIC REACTION PRODUCT OF AN UNSATURATED DILACTONE AND AN ORGANIC COMPLEMENTARY POLYFUNCTIONAL REACTANT CONTAINING AT LEAST TWO GROUPS SELECTED FROM THE CLASS CONSISTING OF HYDROXYL AND PRIMARY AND SECONDARY AMINO GROUPS, SAID UNSATURATED DILACTONE HAVING ONE OF THE FORMULAS
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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |