US3645931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowing agent compositions
Assignee: BXL Plastics Ltd
•
Filing: 1969-07-22
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Granted: 1972-02-29
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Expires: 1989-07-22
Abstract
Abstract BLOWING AGENT COMPOSITIONS COMPRISING AZODICARBONAMIDE AND A SECONDARY BLOWING AGENT ADAPTABLE FOR EXPANDING PLASTIC MATERIALS.
Inventors
- 👤 James K Normanton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:21
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/104; C08J9/102; C08J9/103; Y; Y10; Y10S; Y10S264/00; Y10S264/05
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |