Patent US3366708A successfully refreshed from Google Patents.
US3366708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes formed by reacting lactone polyesters, phosgene, and an aliphatic diamine
Assignee: Individual
•
Filing: 1964-04-13
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Granted: 1968-01-30
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Expires: 1984-04-13
Abstract
No abstract record available.
Inventors
- 👤 Alan B Magnusson
- 👤 John A Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:39
CPC Classifications
C; C08; C08L; C08L75/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2757191A
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US2933478A
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US3169945A
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US3186971A
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US2990379A
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US3051687A
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US3240730A
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US2987494A
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US3227730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-29 | 1971-07-31 | 1972-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-29 | 1975-07-31 | 1976-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-29 | 1979-07-31 | 1980-01-30 | $7700.00 | Window Closed / Lapsed |