Patent US3671345A successfully refreshed from Google Patents.
US3671345A
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Poromeric material having a patent leather-type finish and process for making
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1969-12-11
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Granted: 1972-06-20
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Expires: 1989-12-11
Abstract
Abstract A PROCESS OF MAKING A POROMERIC MATERIAL WITH A PATENT LEATHER-TYPE FINISH COMPRISING THE STEPS OF CASTING A LAYER OF PHASE-INVERTABLE POLYMER SOLUTION, COMPRISING AN EXTENDED URETHANE POLYMER, A POLYVINYL CHLORIDE RESIN, AND A WATER MISCIBLE SOLVENT, ONTO A RELEASABLE SUBSTRATE, PLACING THE LAYER IN A STEAM ATMOSPHERE TO PHASE-INVERT THE SOLUTION AND TO PRODUCE A POROMERIC MATERIAL WITH A PATENT LEATHER-TYPE FINISH ON THE SIDE OF THE MATERIAL ADJACENT THE RELEASABLE SUBSTRATE, DRYING AND REMOVING THE POROMERIC MATERIAL FROM THE RELEASABLE SUBSTRATE. THIS INVENTION ALSO INCLUDES THE PRODUCTS MADE BY THIS PROCESS.
Inventors
- 👤 Jon F Barnes
- 👤 James L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:45
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/12; B32B27/30; B32B27/304; B32B27/40; B32B37/00; B32B37/10; C08L; C08L75/00; C08L75/04; D; D06; D06N; D06N3/00; D06N3/0086; D06N3/0095; D06N3/12; D06N3/14; D06N3/142; D06N3/144; B32B2327/00; B32B2327/06; B32B2375/00; B32B2451/00; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981
Claims Analysis
Total Claims: 0
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |