Patent US2703809A successfully refreshed from Google Patents.
US2703809A
Expired / Lapsed
US
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7-acetyl-1, 2, 3, 4, 4alpha, 9, 10, 10alpha-octahydro-1, 4alpha-dimethyl-9-oxo-1-phenhrenecarboxylic acid and esters thereof
Assignee: Hercules Powder Co
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Filing: 1953-07-31
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Granted: 1955-03-08
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Expires: 1973-07-31
Abstract
No abstract record available.
Inventors
- 👤 Paul F Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C07; C07C; C07C62/00; C07C62/30; C07C62/38; C08K5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A PHENATHRENECARBOXYLIC ACID DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF 7-ACETYL-1,2,3,4,4A,9,10,10AOCTAHYDRO- 1,4A-DIMETHYL-9-OXO-1-PHENANTHRENECARBOXYLIC ACID AND ESTERS THEREOF.
Claim 2
Dependent Claim
16 words
A PHENATHRENECARBOXYLIC ACID DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF 7-ACETYL-1,2,3,4,4A,9,10,10AOCTAHYDRO- 1,4A-DIMETHYL-9-OXO-1-PHENANTHRENECARBOXYLIC ACID AND ESTERS THEREOF.
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) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |