US3518040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of urethane units on the surface of polycarbonate structures
Assignee: Eastman Kodak Co
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Filing: 1968-05-01
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Granted: 1970-06-30
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Expires: 1988-05-01
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Winston J Jackson Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:42
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/6426; D06P1/6429; D06P1/645; D06P1/649; D06P1/6495; D06P1/6497; D06P1/673; D06P3/00; D06P3/34; D06P3/341; C08J2369/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |