Patent US2976197A successfully refreshed from Google Patents.
US2976197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for laminating glass or plastic material
Assignee: Bjorksten Research Laboratories Inc
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Filing: 1954-10-18
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Granted: 1961-03-21
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Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Robert P Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:28
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10779
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE PROCESS OF PRODUCING A POLYMERIC RESINOUS ARTICLE COMPRISING IN COMBINATION THE STEPS OF REACTING TOGETHER THREE COMPONENTS RESPECTIVELY IN THE MOLE RATIO OF FROM 110 TO 250 MOLES OF THE FIRST COMPONENT, 5 TO 40 MOLES OF THE SECOND COMPONENT AND 60 TO 95 MOLES OF THE THIRD COMPONENT, SAID FIRST COMPONENT BEING AN ALDEHYDE, SAID SECOND COMPONENT BEING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA, SAID THIRD COMPONENT BEING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF UREA DERIVATIVES HAVING THE FOLLOWING STRUCTURES:
Claim 2
Dependent Claim
89 words
THE PROCESS OF PRODUCING A POLYMERIC RESINOUS ARTICLE COMPRISING IN COMBINATION THE STEPS OF REACTING TOGETHER THREE COMPONENTS RESPECTIVELY IN THE MOLE RATIO OF FROM 110 TO 250 MOLES OF THE FIRST COMPONENT, 5 TO 40 MOLES OF THE SECOND COMPONENT AND 60 TO 95 MOLES OF THE THIRD COMPONENT, SAID FIRST COMPONENT BEING AN ALDEHYDE, SAID SECOND COMPONENT BEING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA, SAID THIRD COMPONENT BEING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF UREA DERIVATIVES HAVING THE FOLLOWING STRUCTURES:
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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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |