US2780574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming an optical assembly
Assignee: Eastman Kodak Co
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Filing: 1953-04-22
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Granted: 1957-02-05
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Expires: 1973-04-22
Abstract
No abstract record available.
Inventors
- 👤 Howard F Ott
- 👤 Ezra C Poling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:21
CPC Classifications
G; G02; G02B; G02B1/00; C; C09; C09J; C09J7/00; C09J7/10; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/31504; Y10T428/31551; Y10T428/31627
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A METHOD OF FORMING AN OPTICAL ASSEMBLY COMPRISING PLACING THE SURFACES TO BE BONDED IN CONTACT WITH AT LEAST ONE THICKNESS OF A PRECAST FILM OF ADHESIVE MADE UP OF OUTER LAYERS OF POLYMERIZED CHLOROPRENE AND PHENOLALDEHYDE RESIN ELASTOMER AND AT LEAST ONE INNER LAYER OF AN UNPOLYMERIZED, THERMOSETTING PHENOL-ALDEHYDE AND SYNTHETIC LINEAR POLYAMIDE RESIN COMPOSITION, SAID RESIN HAVING THE PROPERTY OF SOFTENING SUBSTANTIALLY TO A LIQUID STATE WHEN HEATED FOR POLYMERIZATION PURPOSES, THEN PLACING THE ASSEMBLY UNDER PRESSURE AND ELEVATED TEMPERATURE TO SET THE ADHESIVE, SAID PHENOL-ALDEHYDE AND POLYAMIDE LAYER PASSING THROUGH A SUBSTANTIALLY LIQUID STAGE WHEN HEATED, BUT BEFORE SETTING, DURING WHICH IT FORCES THE POLYMERIZED CHLOROPRENE AND PHENOL-ALDEHYDE RESIN LAYERS INTO CONTINUOUS AND INTIMATE CONTACT WITH THE SURFACES BEING BONDED.
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |