US3822235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing light-sensitive epoxy resins
Assignee: US Philips Corp
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Filing: 1972-04-20
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Granted: 1974-07-02
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Expires: 1992-04-20
Abstract
Abstract A LIGHT-SENSITIVE POLYMER PRODUCED BY REACTING AN EPOXIDE RESIN WITH P-AZIDOBENZOIC ACID OR AN ESTERIFIABLE DERIVATIVE THEREOF.
Inventors
- 👤 D Hunter
- 👤 P Mayor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:39
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1477; C08G59/18; C08G59/40; C08G59/50; C08G59/52; Y; Y10; Y10S; Y10S522/00; Y10S522/904
Claims Analysis
Total Claims: 0
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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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |