US2884345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infra-red devices and methods
Assignee: Hupp Corp
•
Filing: 1953-11-30
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Granted: 1959-04-28
•
Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 Yves A Rocard
- 👤 Bernhard E Bartels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:34
CPC Classifications
H; H10; H10P; H10P95/00; H10F; H10F30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN THE METHOD OF PRODUCING A PHOTOCELL IN AN ENVELOPE WHICH CONTAINS AN INTERIOR UPSTANDING THIMBLE THEREIN AND WITH THE THIMBLE HAVING ELECTRODES THEREON, THE STEPS WHICH COMPRISES PLACING DRY LEAD SULFIDE POWDER IN THE ENVELOPE, THEN SUBLIMING SAID POWDER, THEN CONDENSING THE VAPOR ON A SURFACE ABOVE THE THIMBLE PARTIALLY OXIDIZING THE CONDENSED VAPOR, THEN SUBLIMING THE LEAD SULFIDE AGAIN AND CONDENSING THE VAPOR TO DEPOSIT A LAYER OF THE SUFLIDE ON THE ELECTODES BEFORE COMPLETING THE OXIDIZING PROCESS.
Claim 2
Dependent Claim
80 words
IN THE METHOD OF PRODUCING A PHOTOCELL IN AN ENVELOPE WHICH CONTAINS AN INTERIOR UPSTANDING THIMBLE THEREIN AND WITH THE THIMBLE HAVING ELECTRODES THEREON, THE STEPS WHICH COMPRISES PLACING DRY LEAD SULFIDE POWDER IN THE ENVELOPE, THEN SUBLIMING SAID POWDER, THEN CONDENSING THE VAPOR ON A SURFACE ABOVE THE THIMBLE PARTIALLY OXIDIZING THE CONDENSED VAPOR, THEN SUBLIMING THE LEAD SULFIDE AGAIN AND CONDENSING THE VAPOR TO DEPOSIT A LAYER OF THE SUFLIDE ON THE ELECTODES BEFORE COMPLETING THE OXIDIZING PROCESS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |