US3506617A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes from polyadipates,bis-(4-isocyanatocyclohexyl) - methane,and 1,2-diaminopropane
Assignee: Rhone Poulenc SA
•
Filing: 1966-07-26
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Granted: 1970-04-14
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Expires: 1986-07-26
Abstract
No abstract record available.
Inventors
- 👤 Georges Collardeau
- 👤 Jean Andre Robin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/758; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4236; C08G18/4238; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2755266A
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US2929800A
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US2917486A
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US3068188A
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US3097192A
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US3184426A
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US3036878A
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US3214411A
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US3357954A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |