US3399137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generation of light by the reaction of anhydrides of oxalic acid with a peroxide in tpresence of a fluorescer
Assignee: Wyeth Holdings LLC
•
Filing: 1965-09-08
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Granted: 1968-08-27
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Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 Rauhut Michael Mckay
- 👤 Bollyky Laszlo Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:21
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/63; C07D213/64; C07C; C07C55/00; C07C55/02; C07C55/06; C07C55/08; C07C57/00; C07C57/30; C07C57/38; C07C63/00; C07C63/04; C07C63/06; C07C63/14; C07C63/15; C07C63/16; C07C65/00; C07C65/21; C07C65/24; C09; C09K; C09K11/00; C09K11/06; C09K11/07; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2420286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |