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Patent US3143560A successfully refreshed from Google Patents.
US3143560A
Expired / Lapsed
US
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Polymeric phenazasilines
Assignee: Merck and Co Inc
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Filing: 1962-08-20
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Granted: 1964-08-04
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Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Wasserman David
- 👤 Robert E Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:30
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2229/00; C10M2229/04; C10M2229/05; C10M2229/052; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
POLYMERIC PHENAZASILINES HAVING THE FORMULA:
References Cited (Backward Citations)
US3065251A
Cited
US3069444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |