Patent US2984686A successfully refreshed from Google Patents.
US2984686A
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6-deoxy-6-demethyl-6-methylene-5-oxytetracyclines
Assignee: Pfizer Inc
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Filing: 1960-12-19
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Granted: 1961-05-16
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Expires: 1980-12-19
Abstract
No abstract record available.
Inventors
- 👤 Robert K Blackwood
- 👤 Hans H Rennhard
- 👤 John J Beereboom
- 👤 Jr Charles R Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:00
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/16; A61K31/65; B; B29; B29D; B29D23/00; B65; B65D; B65D33/00; C; C07; C07C; C07C233/00; F; F16; F16L; F16L11/00; F16L11/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
11 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
11 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 3
Dependent Claim
11 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 4
Dependent Claim
11 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 5
Dependent Claim
11 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 6
Dependent Claim
11 words
COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
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) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |