US3236816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes from a diamine and a diol having a norbornane (norcamphane) nucleus
Assignee: Eastman Kodak Co
•
Filing: 1965-02-24
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Granted: 1966-02-22
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Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Winston J Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3212; C08L; C08L75/00; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A RESINOUS POLYURETHANE SUBSTANTIALLY COMPOSED OF THE FOLLOWING REPEATING UNITS:
Claim 2
Dependent Claim
10 words
A RESINOUS POLYURETHANE SUBSTANTIALLY COMPOSED OF THE FOLLOWING REPEATING UNITS:
References Cited (Backward Citations)
US2666748A
Cited
US2708617A
Cited
US2800464A
Cited
US2900368A
Cited
US2926145A
Cited
US2952666A
Cited
US3184435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |