US2929761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas treatment device
Assignee: Paper Products Inc
•
Filing: 1957-05-20
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Granted: 1960-03-22
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 John A Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:22
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/24; B65D81/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A DEVICE FOR EMITTING A TREATING GAS, THE COMBINATION OF: A FLEXIBLE BACKING SHEET, A FIRST AREA ON ONE SIDE OF SAID SHEET COATED WITH A FIRST SUBSTANCE, AND A SECOND AREA ON SAID ONE SIDE OF SAID SHEET SPACED FROM BUT ALIGNED WITH SAID FIRST AREA COATED WITH A SECOND SUBSTANCE ADAPTED TO CHEMICALLY REACT IN A MOIST ATMOSPHERE WITH SAID FIRST SUBSTANCE WHEN SAIS SHEET IS FOLDED TO BRING SAID AREAS INTO CONTACT WITH EACH OTHER WHEREBY THE REACTION OF SAID FIRST AND SEOCND SUBSTANCES RESULTS IN THE EMISSION OF A TREATING GAS.
Claim 2
Dependent Claim
96 words
IN A DEVICE FOR EMITTING A TREATING GAS, THE COMBINATION OF: A FLEXIBLE BACKING SHEET, A FIRST AREA ON ONE SIDE OF SAID SHEET COATED WITH A FIRST SUBSTANCE, AND A SECOND AREA ON SAID ONE SIDE OF SAID SHEET SPACED FROM BUT ALIGNED WITH SAID FIRST AREA COATED WITH A SECOND SUBSTANCE ADAPTED TO CHEMICALLY REACT IN A MOIST ATMOSPHERE WITH SAID FIRST SUBSTANCE WHEN SAIS SHEET IS FOLDED TO BRING SAID AREAS INTO CONTACT WITH EACH OTHER WHEREBY THE REACTION OF SAID FIRST AND SEOCND SUBSTANCES RESULTS IN THE EMISSION OF A TREATING GAS.
References Cited (Backward Citations)
GB399173A
Cited
US2185954A
Cited
GB517079A
Cited
US2299693A
Cited
US2431470A
Cited
US2465470A
Cited
US2828210A
Cited
US2755188A
Cited
US2821500A
Cited
US2883322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |