US3536910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beam-choppers for use in spectroscopes and like instruments
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1967-10-25
•
Granted: 1970-10-27
•
Expires: 1987-10-25
Abstract
No abstract record available.
Inventors
- 👤 George Thomas Wallace Ormrod
- 👤 William Robert Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:21
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/025; G; G21; G21K; G21K1/00; G21K1/02; G21K1/04; G21K1/043; H01J49/022
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1849271A
Cited
US2875353A
Cited
US2829259A
Cited
US3020455A
Cited
US3093743A
Cited
US3347615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |