Patent US3578544A successfully refreshed from Google Patents.
US3578544A
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Reinforced microporous laminates
Assignee: Phillips Petroleum Co
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Filing: 1968-01-18
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Granted: 1971-05-11
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Expires: 1988-01-18
Abstract
Abstract A REINFORCED MICROPOROUS SHEET IS FORMED BY DISTRIBUTING FIBERS AND BLOWING AGENT IN A SOFTENED ELASTOMERIC OR THERMOPLASTIC MATERIAL, FORMING A SHEET OF MATEIAL HAVING UNIDIRECTIONALLY ORIENTED FIBERS, LAMINATING TWO OR MORE SHEETS SUCH THAT THE FIBERS IN EACH SHEET ARE AT AN ANGLE TO THOSE IN ADJACENT SHEET(S), AND FOAMING DURING OR SUBSEQUENT TO THE PREPARATION OF THE SHEET OR LAMINATE.
Inventors
- 👤 Agmund K Thorsrud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:41
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; B29C70/202; B29C70/12; B29C70/14; B29D; B29D30/00; B29D30/04; B32; B32B; B32B27/00; C; C08; C08J; C08J9/00; C08J9/0085; C08K; C08K7/00; C08K7/02; C08K7/04; B29K; B29K2009/00; B29K2009/06; B29K2023/00; B29K2105/00; B29K2105/04; B29K2105/045; B29K2105/06; B29K2105/12; B29K2105/128; B29K2105/14; B29K2309/00; B29K2309/08; B29K2309/12; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249979; Y10T428/249981
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |