Patent US3738951A successfully refreshed from Google Patents.
US3738951A
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US
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Nonsmearing eraser elastomer compositions
Assignee: Phillips Petroleum Co
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Filing: 1970-07-24
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Granted: 1973-06-12
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Expires: 1990-07-24
Abstract
Abstract EASER FORMULATIONS WHICH ARE NONSMEARING AND DO NOT REQUIRE CURE ARE DISCLOSED, THESE COMPRISING A BLOCK POLYMER, A VULCANIZED VEGETABLE OIL, A NAPHTHENIC OIL AND, OPTIONALLY, CONVENTIONAL FILLERS, DYES, ABRASIVES AND THE LIKE.
Inventors
- 👤 T Middlebrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:00
CPC Classifications
B; B43; B43L; B43L19/00; B43L19/0025; C; C08; C08L; C08L53/00; C08L53/02
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |