Patent US4053675A successfully refreshed from Google Patents.
US4053675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(arylene sulfide)coated glazed surface
Assignee: Phillips Petroleum Co
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Filing: 1975-05-29
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Granted: 1977-10-11
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Expires: 1995-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jennings P Blackwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:03
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C17/00; C03C17/28; C04B41/45; C04B41/46; C04B41/48; C04B41/488; C04B41/52; C04B41/80; C04B41/81; C04B41/82; C04B41/83; C04B41/89; C09; C09D; C09D181/00; C09D181/02
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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |