US2881208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di-tricyclodecane (5, 2, 1, 02, 6)-8, 8'-ether-4, 4'-dicarboxylic acid
Assignee: Ruhrchemie AG
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Filing: 1956-08-15
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Granted: 1959-04-07
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Expires: 1976-08-15
Abstract
No abstract record available.
Inventors
- 👤 Buchner Karl
- 👤 Meis Josef
- 👤 Roelen Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:58
CPC Classifications
C; C07; C07C; C07C62/00; C07C62/08; C07C62/12; C07C62/14; C07C47/00; C07C47/28; C07C47/37; C07C47/38; C07C47/47; C07C51/00; C07C51/16; C07C51/295
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |